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Ⅰ What is blockchain
What is blockchain
What is blockchain? Many people have no idea what blockchain is. It is not very clear, and some people have even never heard of it. In fact, blockchain is a common technology. I have compiled relevant information about what blockchain is for everyone.
What is blockchain 1Speaking of blockchain, we have to mention its twin brother-Bitcoin.
Time goes back to 11 years ago. On November 1, 2008, the world was shrouded in the huge shadow of the financial crisis. That day, a mysterious geek who called himself "Satoshi Nakamoto" sent a group email.
Attached to the email is a paper titled: "Bitcoin: A Peer-to-Peer Electronic Cash System."
Satoshi Nakamoto said in the email that he is working on a new electronic cash system that is completely peer-to-peer and does not require any trusted third party. About half a month later, Satoshi Nakamoto released the source code of the Bitcoin system non-stop.
On January 3, 2009, an interesting invention turned out. Satoshi Nakamoto generated the first Bitcoin block on the server, which is the so-called "Bitcoin genesis block". Since then, the Bitcoin system has officially opened.
Having said that, you might as well stop and think about how we conduct cash transactions in real life.
Suppose you borrow 10,000 yuan from a friend and promise to pay it back in one month. You may choose to repay the loan by bank card transfer. The bank is responsible for deducting 10,000 yuan from your deposit account and adding 10,000 yuan to your friend's deposit account.
Here, the bank is the institution responsible for keeping accounts. The underlying reason why you choose bank transfer is that you believe it is more reliable and will help you transfer 10,000 yuan to a friend.
However, in the digital world, inventing a currency is another matter.
The hero behind the Bitcoin game
First of all, Satoshi Nakamoto hopes to conduct peer-to-peer direct transactions, bypassing the third party of the bank. This problem is easy to solve. Then there will be no banks. Users will issue their own currencies through a unique mechanism and trade directly with each other.
But this brings another problem. There is no bank as a reliable intermediary responsible for accounting, and users do not know each other. How to ensure that no one cheats during transactions?
For example, in the digital world, electronic files can be easily copied. 10 yuan of digital currency turns into 100 yuan by copying and pasting it with the mouse 10 times. Isn’t it a mess?
To solve this problem, we need to provide a mechanism for everyone to trust each other.
The method adopted by the Bitcoin system is to record all transaction processes openly and transparently in chronological order. These records are permanent and cannot be tampered with. There is no wayDid some sneaky stuff.
With these mechanisms, the Bitcoin system operates successfully.
This system stores data in units of data blocks, which are blocks. Approximately every 10 minutes, new blocks will be added. Each block records the detailed transaction process of Bitcoin and is timestamped. Different blocks are connected in chronological order through a certain algorithm, which is a chain.
Together, they are called "Blockchain".
In this way, the blockchain took root with the birth of Bitcoin. If Bitcoin is the star in front of the spotlight, blockchain is the hero behind the scenes responsible for providing a trust mechanism in the underlying technology.
Brand new changes in accounting methods
Although behind the scenes, the talent of blockchain was quickly discovered.
In technical terms, blockchain is a distributed ledger technology. To understand it, let’s take the simplest example.
Suppose your family keeps accounts like this: you, your father, and your mother each have an account book. You each record your own expenses, and at the end of each month, you tally the total household expenses together.
But dad likes to buy cigarettes, mom likes to stock up on cosmetics, and you like to buy snacks. You may both miss a few entries intentionally or unintentionally, and sometimes make corrections in the ledger. Therefore, when checking the accounts at the end of the month, there is always a discrepancy with the actual expenditure of the family.
In order to change this situation, you bought a new account book. You, your father, and your mother jointly use a new account book to keep accounts, remind and supervise each other, and check every expense together.
At the same time, you also agreed that once the expenses are clearly recorded, no alteration or deletion is allowed. After trying it for a few months, you found that this joint ledger matched the actual expenses of the family much more closely.
Blockchain is the second accounting method. The little story above tells us that it has at least these major features or benefits.
First of all, it is decentralized. The database that was previously maintained by one party has become jointly maintained by multiple parties. Everyone writes data together based on consensus, and no one can control the data alone.
Secondly, it allows everyone to change from keeping separate accounts to joint accounting, which brings consistency and openness and transparency to the data.
In addition, the blockchain only allows data to be written, not deletion or modification, which prevents data from being secretly tampered with.
Mutual trust between strangers
In reality, many scenarios are much more complicated than how to keep accounts at home. Moreover, many aspects of financial transactions and business processing are mostly operated by strangers. How can we make everyone trust each other?
It’s blockchain’s turn to show its talents. Don’t forget, it can provide a mechanism for everyone to trust each other from the underlying technology.
For example, when you usually go to the wet market to buy things, you may worry about whether fish, shrimp, and vegetables are safe. Some companies see business opportunities and move the data of farmers and fish ponds to the blockchain. In this way, you will know which fish pond the fish you buy comes from, and you will feel more confident when eating.
For another example, links to fundraising for seriously ill patients often appear in Moments. When making a donation, you may have some concerns: Is the patient's condition real? Can donations really be delivered to patients?
In order to eliminate these concerns, some Internet charity organizations use blockchain to allow you to clearly view the steps for using your donation. If the review finds that the patient's condition is not true, the blockchain system will automatically return the donation to your account.
In the future, what changes can blockchain bring to our lives?
It is conceivable that when blockchain is widely used in various fields of society, it will become an important infrastructure in the information age and can solve many of the headaches that currently cause us.
For example, blockchain will allow countless islands of information to be "chained" together. When seeing a doctor, there is no need to repeat the examination just because you change hospitals. Entrepreneurs do not have to go to multiple departments to go through a procedure; many transactions no longer need to be done. Third-party guarantees are required, consumers no longer worry about non-refundable deposits, and creators do not have to worry about their works being stolen but getting nothing...
What is blockchain 2From an academic perspective, blockchain is New application models of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanisms, and encryption algorithms. Blockchain is essentially a decentralized database.
Many people still don’t understand this explanation, so let me make a simple metaphor.
Hypothetical situation: Suppose you have a ledger at home and you are asked to keep accounts. In the past, your parents gave you your salary and asked you to record it in your account book. If you are greedy and want to buy something delicious in the meantime, the record in the ledger may be less than ten yuan.
This is just an example. I believe that when we were children, everyone probably wanted to take some money from their parents’ pockets to spend.
Ways to use blockchain to solve problems:
If you use the whole family mobilization method to keep accounts, the above-mentioned problems will not exist, because you are keeping accounts, and your father They are also keeping accounts, and your mother is also keeping accounts. They can all see the general ledger. You can't change it, and neither can your parents. So your father who wants to buy cigarettes and you who want to eat have nothing to do.
Functional "blockchain"
It can not only record every transaction, but also can be programmed to record almost everything of value to mankind. Things: birth and death certificates, marriage licenses, title deeds, degrees, financial accounts, medical history, insurance claims, ballots, food sources, and anything else that can be represented by a code.
Each block is like a hard disk, which stores all the above information.Save it and then encrypt it through cryptography technology. The saved information cannot be tampered with.
Every 10 minutes, the blockchain system will check all data generated during the period (such as transaction records and records of when the block was edited or created, etc.) and store these data in a new area. On the block, this block will be connected with the previous block to form a chain. Each block must contain relevant information from the previous block to be effective.
Characteristics of blockchain
1. Exceptionally safe:
Unlike centralized databases owned by companies or government agencies, blockchain is not controlled by anyone. or entity's control, data is replicated (distributed) in its entirety across multiple computers.
Unlike centralized databases, there is no single entry point for attackers, and data security is more guaranteed.
2. Non-tamperability:
Once entered into the blockchain, no information can be changed, and even the administrator cannot modify this information.
Once something appears, it cannot be changed. This attribute is of great significance to the changeable and ever-changing online world that humans currently live in.
3. Accessible:
All nodes in the network can easily access information.
4. No third party:
Because the blockchain is decentralized, it can facilitate peer-to-peer transactions, so whether you are trading or exchanging funds, there is no need for a third party of approval.
Blockchain itself is a platform.
Blockchain technology refers to a way for all people to participate in accounting. There is a database behind all systems. You can think of the database as a big ledger. Currently, each is keeping its own account.
Since there is no centralized intermediary agency, letting everything run automatically through preset programs can not only greatly reduce costs, but also improve efficiency. And since everyone has the same ledger, it can ensure that the ledger recording process is open and transparent.
Blockchain technology is the underlying technology of Bitcoin. Without the operation and management of any centralized organization, Bitcoin has been running very stably for many years without any problems, so some people have noticed its The underlying technology abstracts the Bitcoin technology and calls it blockchain technology, or distributed ledger technology.
According to a report released by Santander, Spain's largest bank, if all banks around the world use blockchain technology internally around 2020, they will save approximately US$20 billion in costs per year. Such data is enough to illustrate the tremendous changes and breakthroughs that "blockchain" has brought to the traditional financial field.
Cloud computing is usually defined as providing dynamically scalable and often virtualized resources through the Internet, but a cloud computing platform is often provided by a centeration institutions. The network composed of blockchain generally does not have a specific organization, so blockchain is closer to the definition of a distributed computing system and is a type of distributed computing.
The future development and application scenarios of blockchain
1. Digital identity
Many people will encounter "prove that my mother is me" when applying for various certificates. "Mom" dilemma, with blockchain, you no longer have to worry about it.
It turns out that our birth certificates, real estate certificates, marriage certificates, etc. need a central node for everyone to recognize them. Once cross-border, contracts and certificates may become invalid because of the lack of a global central node.
The non-tamperable nature of blockchain technology has fundamentally changed this situation. Our birth certificates, real estate certificates, and marriage certificates can all be notarized on the blockchain and become things trusted by the world. , of course, it can also easily prove "my mother is my mother".
2. Health care
Simply put, it is to use the blockchain to establish a universal record repository with timestamps, so that different databases can extract data information.
For example, when you go to see a doctor, you don’t have to change hospitals for repeated examinations, and you don’t have to worry about reimbursement for medical insurance, which can save time and expenses.
3. Travel consumption
For example, we often use apps such as Ctrip and Meituan to find and place orders for hotels and other services, and each platform gets commissions from them.
The application of blockchain is to remove middlemen and create a secure, decentralized way for service providers and customers to connect and trade directly.
4. More convenient transactions
Blockchain can make payments and transactions more efficient and convenient. The blockchain platform allows users to create smart contracts that become active when certain conditions are met, meaning that automatic payments can be released when both parties to a transaction agree that their conditions are met.
5. Strictly control product quality
If you buy an apple, with blockchain technology, you can know the entire process from the production of the fruit farmer to the circulation link. Among them are government regulatory information, professional testing data, enterprise quality inspection data, etc. A smart supply chain will make the food we eat and the products we use every day safer and give us more peace of mind.
6. Property rights protection art
The creator puts his work on the blockchain, and if someone uses his work, he can immediately Know. Corresponding royalties are also automatically paid to the creator.
Blockchain technology not only protects copyright, but also helps creators sell their works to consumers better and more directly, without the need for the assistance of distribution companies.
What is blockchain 3Advantages of blockchain
Decentralized, it does not require a thirdThe intervention of three parties enables point-to-point transactions, coordination and collaboration. Because the data is distributed in various nodes through algorithms and has a unique verification mechanism, no one organization or individual can control the global data. Since it is distributed in various nodes, any node stopping work will not affect the entire system. Operation, this decentralized network will greatly improve data security. The data in the system is jointly maintained by various nodes with maintenance functions.
Openness. In addition to the private information of all parties being encrypted, the blockchain data is open to everyone. Anyone can query the blockchain through the public interface. Data and development related applications, so the entire system information is highly transparent.
Where does blockchain come in?
Blockchain is an open, transparent, decentralized and secure technology. This technological revolution is applied to the Internet. For data-sensitive fields such as medical care, public opinion supervision, and ecological testing, it can prevent data from being tampered with and ensure the authenticity of the data.
In short, blockchain is not just a method of virtual currency. Its advantages will play an important role in many industries.
Ⅱ What is blockchain? Will its use become a new trend?
Three Questions about Blockchain (Economic Hotspot)
In recent times, news about Bitcoin has been very eye-catching, and blockchain has also become popular. Bundle. In the capital market, the stock prices of various blockchain concept stocks rise and fall like a thrilling roller coaster. It can be seen from the responsive capital market that blockchain is on the forefront and has received great attention from all parties.
"Blockchain technology is essentially a database technology, specifically a ledger technology. The ledger records the asset changes and transactions of one or more accounts. In fact, it is A database with the simplest structure. The running accounts we usually write down in small notebooks and the statements sent by the bank are all typical account books." Wang Jun, chief researcher of Tencent Financial Technology Think Tank, said that security is an aspect of blockchain technology. Its major features are mainly reflected in two aspects: first, the distributed storage architecture, the more nodes, the higher the security of data storage; second, its tamper-proof and decentralized ingenious design, it is difficult for anyone to not follow the rules change the data.
Take online shopping transactions as an example. The traditional model is that the buyer purchases the goods and then transfers the money to the intermediary platform of a third-party payment institution. After the seller ships the goods and the buyer confirms receipt, the buyer will then notify the payment The institution transfers the money to the seller's account. The transaction model supported by blockchain technology is different. Buyers and sellers can trade directly without going through any intermediary platform. After the buyer and seller trade, the system releases the transaction information through broadcast. All hosts that receive the information record the transaction after confirming that the information is correct, which is equivalent to all hosts making data backups for this transaction. Even if there is a problem with a certain machine in the future, it will not affect the data recording, because there are countless machines as backup.
When it comes to blockchain, many people justIt is associated with Bitcoin, and many people even equate blockchain with Bitcoin. He Fei said that Bitcoin is a presentation method of blockchain, but blockchain is not the same as Bitcoin. Blockchain is the underlying technology and infrastructure of Bitcoin, and Bitcoin is a successful application of blockchain, but it does not mean that blockchain can only be applied to Bitcoin.
What is the use of blockchain?
It can solve the pain points and difficulties in many fields such as finance, public welfare, supervision, and anti-counterfeiting, but there are many applicable conditions
Financial services are the first application field of blockchain technology. The use of blockchain technology can solve pain points in many fields such as payment, asset management, and securities.
Take the payment field as an example. The cost of reconciliation, clearing, and settlement between financial institutions, especially cross-border financial institutions, is high and involves many manual processes. The high fees also make it difficult to carry out micropayment business. The application of blockchain technology can help reduce the cost of reconciliation and dispute resolution between financial institutions, and significantly improve the processing efficiency of payment services. In addition, the cost and efficiency advantages that blockchain technology brings to the payment field enable financial institutions to better handle small-amount cross-border payments that were previously considered unrealistic due to high costs, helping to achieve inclusive finance.
For example, in order to solve the problem of high reconciliation costs among financial institutions, in August 2016, WeBank and Shanghai Huarui Bank launched the Weilidai inter-institution reconciliation platform, which is also the first in production in China. Banking industry consortium chain application scenarios running in the environment. Zhang Kaixiang, chief architect of WeBank’s blockchain, believes that the high cost problem that the traditional “batch file reconciliation” model has not been able to solve for a long time is where blockchain technology comes in. Subsequently, Luoyang Bank and Changsha Bank also successively connected to the inter-institution reconciliation platform. Through blockchain technology, they optimized the inter-institution reconciliation process in the micro-loan business, achieving quasi-real-time reconciliation, improving operational efficiency, and reducing operating costs. Target. Up to now, the platform has been running stably for more than a year, maintaining zero failures, and the number of real transactions recorded has reached tens of millions.
In the field of public welfare, blockchain technology also has great potential. Ant Financial's first application scenario involving blockchain was public welfare, helping a group of hearing-impaired children obtain a donation, and then using blockchain technology to promote public welfare to be more open and transparent. Hu Danqing, senior product expert at Ant Financial Technology Lab, said: "The blockchain charity platform is like us building a post office on the Internet specifically for mailing funds. Every money donated by users, we will package it into a The package is delivered through the blockchain platform. Every time it passes through a node, we will stamp a postmark and finally deliver it to the recipient. This ensures that every money donated by users is transparent, traceable, and difficult to tamper with. ”
Blockchain technology can play a big role in combating counterfeit goods. Hu Danqing introduced that Ant Financial uses blockchain technology to trace the origin of authentic products. Currently, there are some overseas shopping products from Australia and New Zealand, such as milk powder. Use Alipay to scan them., you can know whether it is genuine or not. "Unlike the previous self-entered product information by merchants, blockchain allows multiple 'bookkeepers' to complete accounting fairly, independently, and non-repudiation."
For financial supervision, blockchain Technology can also play a role. The "Financial Blockchain Underlying Platform FISCO BCOS White Paper" released by the Financial Blockchain Cooperation Alliance (Shenzhen) in 2017 believes that blockchain provides financial regulatory agencies with consistent and easy-to-audit data. Data analysis can supervise financial businesses faster and more accurately than traditional audit processes. For example, in an anti-money laundering scenario, the balance and transaction records of each account are traceable, and no aspect of any transaction will be out of sight of supervision, which will greatly enhance anti-money laundering efforts.
Some people in the industry believe that blockchain 1.0 is mainly aimed at digital currency; blockchain 2.0 is aimed at smart contracts and can be applied in the financial market; blockchain 3.0 will be applicable to more scenarios, and even Create a "blockchain era".
He Fei believes that blockchain can indeed solve the pain points and difficulties in many fields, but blockchain is not a panacea and has many applicable conditions.
For example, the decentralized nature of blockchain technology is suitable for scenarios involving multi-party participation. If it is only unilateral or bilateral participation, it will be of little value. Since each node needs to be checked, blockchain technology is not suitable for high-frequency trading activities.
For another example, blockchain emphasizes openness and transparency and is not suitable for scenarios with particularly high data privacy requirements.
Will blockchain become a new trend?
The technology is not yet mature, so we must be wary of concept hype, and we must distinguish between technological innovation and fund-raising innovation. We cannot use blockchain for the sake of blockchain
The concept of blockchain is so Will Fire become another “Internet+” in the future?
In recent years, the development ecosystem of blockchain has gradually been improved and enriched. Industry insiders believe that with national policy support, widespread attention and financial support, blockchain technology can achieve gradual and stable progress. Although the upside prospects of blockchain technology are broad, we must remain calm about this.
“Although blockchain is currently very popular, we still believe that it is still in a very early stage.” Hu Danqing said that there is currently false enthusiasm in the blockchain concept, and it is not the technology that solves the problem. The real problem is that the focus is on raising funds to make money and hyping valuations. In particular, most of the so-called ICOs (Initial Coin Offerings) that are so popular are innovations in fundraising tools and have nothing to do with technological innovation.
Blockchain technology can indeed create great value, but some risks cannot be ignored.
“Blockchain technology is not yet mature, and its application scenarios are relatively limited. We should be more wary of the concept of capital market speculation.” He Fei said that behind the blockchain boom, there will inevitably be some gimmicks and speculation. Companies that do not really do business, they just try to make a profit in the capital market and leave. We must beware of the situation where "bad money drives out good money", which leads to people who really want to do business.institutions have withdrawn from the market, affecting the application of blockchain technology.
Hu Danqing suggested that for the current blockchain craze, regulatory authorities should intervene more proactively, distinguish between technological innovation and fund-raising innovation, and encourage government organizations, credible experts, and industry participants to jointly help the public Identify and comprehensively curb fund-raising innovation in the name of blockchain, so that the actual controller of ICO must bear responsibility for the fund-raising behavior. "The basis for judging whether it is technological innovation or fund-raising innovation is actually very clear, that is, whether it starts with trust and whether it creates actual value by solving the trust problem."
Better promotion and use of blockchain technology in the future , it is necessary to continue to improve infrastructure and strengthen the formulation of relevant laws and policies.
Wang Jun believes that there is still room for optimization and improvement in core blockchain technologies such as consensus algorithms; on the other hand, the processing efficiency of blockchain is still difficult to reach that of some high-frequency application environments in reality. Require. At present, the mainstream blockchain technology platforms all originated from abroad. Domestic blockchain technology service providers must patiently start from the bottom development, achieve independent and controllable technology, and strive to lead the development of global blockchain technology. Enterprises with blockchain application scenarios must actively embrace new things and scientifically evaluate their on-chain needs. They cannot use blockchain for the sake of blockchain.
He Fei believes that the government can introduce relevant policies to guide companies that are interested in participating in the research and development and application of blockchain technology, and at the same time clarify some suitable application scenarios of blockchain and areas encouraged by the state.
The "China Blockchain Technology and Application Development White Paper 2016" recommends that government departments at all levels learn from the advanced practices of developed countries and regions, combine the development of my country's blockchain technology and applications, and promptly introduce blockchain Technology and industrial development support policies focus on supporting key technology research, major demonstration projects, "mass entrepreneurship and innovation" platform construction, system solution research and development, and public service platform construction. At the same time, it is recommended that key domestic enterprises, scientific research, universities and user units strengthen cooperation to speed up research on core key technologies such as consensus mechanisms, programmable contracts, distributed storage, and digital signatures.
If it can bring money to the enterprise, it will become a hot topic.
Ⅲ Do you talk about blockchain projects with your friends?
Often, blockchain technology is very popular recently and has attracted attention from all walks of life.
IV What exactly is blockchain
Blockchain is a new application model of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm. Simply put, blockchain is a decentralized distributed ledger database.
Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithms. After reading this, you may still be confused. In fact, in vernacular terms, blockchain is a decentralized distributed ledger database. The advantage of this distributed ledger is that buyers and sellers can trade directly without any intermediary. Everyone has a backup, even if your copy is lost, it will not be affected.
So what is distribution and decentralization? Take marriage registration as an example. In the past, when two people got married, they had to go to the Civil Affairs Bureau to go through the formalities, and then enter the information into the computer to complete the legal process. What if we use blockchain technology? As long as two people agree to get married and post a message in their circle of friends, the marriage process is completed and there is no need to go to the Civil Affairs Bureau. Your friends are common witnesses. They may be scattered around the world, but their mobile phones will help you record the information and tell others who want to know the situation.
If you want to conceal your marriage information, you used to have to modify the records on the Civil Affairs Bureau's computer, but now you have to modify the records on the mobile phones of all insiders at the same time. The more people who know about it, the less likely it is to modify it. Therefore it is an impossible task. This is distribution and decentralization.
On the network, every once in a while, a block will be generated. This block is equivalent to a network record book, which is used to record relevant information that has occurred over a period of time. Waiting for this record book When the record is full, a new record book will be generated. Once the information is recorded, all participants will be notified and everyone's record book will be updated simultaneously.
These record books are eventually connected in series with each other. This is blockchain technology. Because of the use of cryptography technology, if someone wants to unilaterally tamper with the message, it will be verified through the blockchain algorithm protection mechanism. If the time point does not match and the related information does not match, other people will not update their record books. Then this information is invalid.
Therefore, compared with traditional information storage technology, blockchain technology is more secure, transparent, and information is irreversible.
Blockchain is not equal to Bitcoin, it is just an underlying technology invented to realize the digital currency of Bitcoin. Blockchain can be applied in a wider range. In addition to digital currency, it can also be applied in financial aspects such as P2P lending, global payment, micro-finance, electronic payment, remittance, etc. It can also be used in people's livelihood aspects such as intellectual property, elections, and notarization. The prospects for future development are huge.
IV What exactly is blockchain and how do ordinary people make money in blockchain?
The popularity of blockchain has caught the masses off guard. Nowadays, no one knows about blockchain, but many people do not have a clear understanding of the definition of blockchain.
So, what exactly is blockchain?
Regarding blockchain and Bitcoin, most people have this misunderstanding: Bitcoin is blockchain.
In fact, Bitcoin and blockchain are not the same thing. Blockchain is the underlying technology of Bitcoin, but the first usage scenario after the birth of blockchain is Bitcoin.
I will explain to you what Bitcoin is and what blockchain is, so hurry upMove the small bench quickly!
What is Bitcoin?
Bitcoin is a digital currency, a peer-to-peer encrypted digital currency. It is not a tangible paper currency such as RMB or US dollars. It is generated by computers through specific mathematical calculations. Also stored in the computer.
Because Bitcoin is just a string of data in a computer, it is also called a "virtual currency" compared to paper currency. To put it simply, you can understand that Bitcoin is just a string of numbers with cash value, similar to Q coins. In other words, Bitcoin has no actual value. Its current value is supported by the faith of currency speculators. If the faith is gone, the value of Bitcoin will collapse.
Bitcoin is magical, what is its magic?
If you want to get Bitcoin, in addition to buying it, you can also mine it. The original Bitcoin is mined!
1) Mining
The first thing that comes to mind for many people is the image of a coal mine:
Mine, absenteeism, dust , black coal, large trucks.
Bitcoin mines are not like this. They only need electricity, network cables, and computers. However, mining this mine is a technical job, and it tests the performance of the computer's CPU and GPU.
2) Transaction
How does a Bitcoin transaction proceed?
Each user has a unique address, which is the Bitcoin "wallet". For every transaction, for example: A pays B a Bitcoin, a Weibo post will be posted publicly in the system saying: "I gave B a Bitcoin @B". These records will be kept as evidence at every terminal of the system. on the chain.
If A wants to go back on his word and tamper with Bitcoin’s transaction history, then every terminal record on the network must be modified. However, this is not easy, because only A whose computing power exceeds the sum of the computing power of all nodes in the system can tamper with transaction records. Obviously, this is unrealistic.
In the transaction process, Bitcoin uses a decentralized accounting method, which is also blockchain technology. Simply put, blockchain is a decentralized distributed ledger database.
What is blockchain?
The blockchain was created along with Bitcoin. During the formation of Bitcoin, blocks were storage units one by one, recording the communication information of each block node. Blocks are very similar to For database records, every time data is written, a block is created. With the expansion of information exchange, one block continues with another, and the result is called a blockchain.
Blockchain is a distributed ledger technology in which everyone participatesAccounting, everyone has a copy of the ledger information. This account book is not easy to forge and is traceable.
For example:
On a certain day of a certain year, Lao Wang lent Xiao Wang 10,000 yuan. Lao Wang told everyone around him the news , the transfer records were posted on WeChat Moments, and everyone helped them testify to the existence of this transaction.
Lao Wang and Xiao Wang are two nodes. These two nodes generate transaction time, location, person and other information, and they are packaged to form a "block". Lao Wang’s friends are also nodes. These nodes jointly record the transaction status and details (blocks) of the two nodes Lao Wang and Xiao Wang. These blocks are connected to form a chain, forming a decentralized database.
In the past, only both parties knew when Lao Wang and Xiao Wang borrowed money. This was the centralized accounting model. But now everyone knows it and records it in their own ledgers. This is the decentralized accounting model. model.
When one day, Xiao Wang regrets that he did not borrow the money, everyone around him will know their transaction information, so Xiao Wang will not be able to deny it. This is the blockchain Information sharing cannot be tampered with.
How do ordinary people make money by participating in the blockchain?
I have summarized several methods suitable for ordinary people to make money during the blockchain bonus period.
1. Direct investment in blockchain: buy coins or buy some blockchain stocks, but the currency circle is risky, so you must be cautious when buying, and there are many blockchain stocks now. However, there are risks in the stock market, so investment needs to be cautious.
2. Make blockchain self-media: run a WeChat public account or Toutiao account, write articles about blockchain and publish them on it. If you are good, you can also get some good profits.
3. Participate in technology development: In fact, it is very simple, it is to participate in the process of blockchain development. However, this method requires high technical threshold.
4. Blockchain training: Companies that can provide blockchain technology training or knowledge training.
That’s all the relevant knowledge about what blockchain is, I hope it can bring you some help.
VI Smart Healthcare: Technology promotes the development of healthcare
In recent years, 5G technology, Internet of Things, artificial intelligence, big data, regional A new generation of information technology such as blockchain technology is booming, and smart devices that were once in science fiction stories or prophecies have become a reality. Similarly, due to the development of technology, smart education, smart cities, smart medical care, etc. are becoming more and more popular among experts. Their predictions are gradually becoming reality and increasingly affecting people's production, life and life.
Different from the traditional medical model, smart medical care is data-intensive and can assist doctors through simple and friendly interaction methods, big data analysis and artificial intelligence. Detect lesions, improve diagnostic accuracy and efficiency, and play a role in improving medical service levels and alleviating the strain on medical resources.
Nowadays, digital, networked, and intelligent facilities and solutions are being integrated with medical scenarios at an accelerated pace, making smart medical care around us.
What is smart healthcare
Smart healthcare is the product of the integration of life sciences and information technology, and is an important component of modern medicine and communication technology part.
Smart healthcare has similarities with concepts such as digital healthcare and mobile healthcare, but smart healthcare has obvious advantages in system integration, information sharing and intelligent processing. A higher stage of specific application of the Internet of Things in the medical and health field.
Simply put, it is to use the new generation of information technology, network technology and Internet of Things technology to create The regional medical information platform for health records realizes the interaction between patients and medical staff, medical institutions, and medical equipment, ultimately solving the problem of information asymmetry among all parties and achieving a win-win situation for all parties.
The core of smart medical care is digitization, which digitizes medical information, disease information, etc., and uses data to record and transmit it. With the advancement of science and technology, there have been many successful cases of smart medical applications in the medical and health fields. Surgical robots, VR, smart blood glucose meters, wearable devices, smart ponies, etc. are all integral parts of smart medical care.
Current status of smart medical care
1. National policy support
With the acceleration of the aging trend of our country’s society, The demand for health services continues to grow. Since 2014, the central and local governments have intensively introduced a series of policies to deepen reform around smart medical and pharmaceutical industries, laying a policy foundation for the construction of smart medical. According to the "2017-2021 China Smart Medical Industry Market Development and Investment Trend Research Report" released by the China Industry Research Report Network. With the help of policies, the domestic medical information solutions market has reached 10.85 billion yuan, with a compound annual growth rate of 29.6% from 2015 to 2020. In the future, the market size will exceed 50 billion yuan.
Currently, emerging technologies are empowering the medical business to an increasing extent. Concepts such as "Internet + medical care" and "5G + medical care" were frequently raised by representatives of the two sessions.
2. Internet companies enter the market
Attracted by the broad prospects of smart medical care, Internet companies headed by BAT have begun to invest in the medical industry. Among them, Alibaba has created Ali Health and "Medical Cloud" services; the Internet medical ecological chain jointly created by Tencent, Lilac Garden, and Zhongan Insurance has taken shape; many large enterprises have integrated medical resources through mergers and acquisitions, and laid out the smart medical industry chain. Statistics from the "2017-2021 China Smart Healthcare Market Special Research and Future Market Capacity Assessment Report" show that as of 2016, my country's smart healthcare investment scale was nearly 50 billion yuan, and it is expected that by 2020, the investment scale will expand to 100 billion yuan.
The role of smart healthcare
The role of smart healthcare, in summary, is:
1. For patients Provide high-quality, efficient and safe medical services
2. Reduce the workload of medical staff and improve medical efficiency
3. Popularize medical and health knowledge and publicize and implement public health policies
p>4. Improve national health quality
5. Strengthen the sharing of medical resources and reduce social medical costs
6. Prevent and respond to public health emergencies more effectively
Problems with smart medical care
my country’s smart medical care is still in its infancy, and it still needs to improve policies, mechanisms and technologies. Collaborative efforts will be made in innovation and other aspects.
1. Medical data is difficult to share
The development of smart medical construction in my country has generally shown a steady upward trend, but the intelligence of the medical industry The level of medicalization and informatization is not high enough, and the integration and sharing of medical resources are difficult to fully demonstrate.
Due to the different urban development in various regions, the degree of local medical dataization in each region is also different. Due to the different degrees of dataization, there is an obvious information asymmetry between hospitals. This can easily lead to inconsistent collection and compilation of medical and health data in various regions, inconsistent evaluation standards, etc., which also leads to the creation of "data islands".
Because hospitals are isolated from each other, patient information cannot be synchronized. After patients enter the hospital, they may undergo the same examination.It needs to be done repeatedly, which brings huge waste of manpower and material resources, reduces the efficiency of the industry, and hinders the rapid development of the industry.
2. Data security is a problem
Data, as an important support for artificial intelligence, has problems with the source and security of medical data. A big shortcoming.
For example, the 2019 Project Nightingale, a collaboration between Google and Ascension, the second largest healthcare system in the United States, collected data without notifying patients. Health data of millions of Americans.
As the public becomes increasingly wary of personal data privacy security, how to seek medical big data The balance between "openness" and "privacy" will become an urgent issue to be solved. In addition, the smart medical industry itself is also facing the problem of far insufficient amount of real, reliable and high-quality data
3. The level of smart medical care is low
Although my country’s current policies and relevant laws and regulations are giving certain space and resources to the development of smart medical care, the current situation is that many medical and health-related companies and institutions have not formed a complete chain with hospitals. A smart service chain covering the entire life cycle, including prevention, diagnosis, treatment, and health care, has not yet been established. For example, online diagnosis and treatment are "disconnected" from intelligent monitoring, and smart devices such as heart monitoring and sleep monitoring have not yet been connected to medical institutions, affecting the efficiency of treatment.
We need to build a national health information platform as soon as possible, open up regional data resource channels, and improve business collaboration capabilities; Cross-department data flow and build an integrated interactive network.
How to use the advantages of machines, artificial intelligence and the Internet to help doctors solve problems has become a difficult point in the construction of smart medical care.
Solutions to current problems in smart healthcare
The medical and health industry is no more than other industries. It is an important pillar industry related to people's life safety. Therefore, Both the country and society attach great importance to these issues.
As a member of the medical and health industry, Xima Health is also actively seeking solutions to the above-mentioned problems, so it added blockchain to In smart medical care, it is innovatively proposed to put medical and health data on the chain to ensure data authenticity and security while breaking data silos, promoting data exchange, and integrating dataThe value generated by the data is returned to the data generator itself.
1. Data is uploaded to the chain to ensure data authenticity and security
Xima Health Smart Terminal Smart Pony uses trusted health data Collection equipment collects users' real and credible health data, uploads it to the personal health data center, and then uses the personal health data center to desensitize, encrypt, and distribute the user data to the blockchain, using blocks Features such as chain security and non-tamperability ensure data security.
2. Break down data silos and integrate data resources
Hospitals or medical institutions can The relevant health data that the user has authorized can be used for disease diagnosis, medical research, etc., and the user can trace the data viewing status through the authorization record to monitor the access status of the data. It not only ensures that the data is not abused, but also facilitates the sharing and use of medical data.
The doctor can view the patient's past health data through the shared data provided by the user in the personal health data center, which facilitates the doctor's understanding of the user's condition and enhances the It improves the accuracy of medical treatment and improves the efficiency of medical treatment. It also prevents patients from going to the hospital frequently, allowing patients and users to avoid too many repeated examinations, and also reduces the waste of medical resources to a certain extent.
While ensuring users’ right to know the use of data, the Personal Health Data Center uses blockchain as a peer-to-peer data sharing network to encourage users to Share their personal health data selectively and anonymously, allowing data to flow to break down data silos. And in order to encourage users to behave this way, Xima Health will also give corresponding digital points as rewards.
3. Customized and precise health services
AI intelligence conducts forward-looking disease predictions based on the data uploaded by users’ personal data centers. And it accurately matches customized service plans such as health insurance and health management to realize user disease prediction, so that targeted prevention can be carried out in advance. Users will no longer seek treatment only when they are sick, but can monitor and prevent the entire process. Physical illness.
4. Promote medical and health knowledge, communicate and help each other about illness
Xima Health The health community established on the platform includes a communication community for various diseases and shares various relevant knowledge to help patients or healthy people have targeted ideas.The prevention and conditioning treatment allows everyone not only to have a circle of friends, but also a healthy life circle.
Conclusion
The development of smart medical care will effectively solve the problem of expensive and difficult medical treatment for patients, and strengthen various aspects of medical and health care. Collaborative cooperation among subjects can improve my country's medical modernization and improve the level of medical services. Xima Health will also strive to achieve the goal of exchanging and sharing medical data, effectively integrating medical files, building a smart medical platform to achieve intelligent and informatized medical care, and taking China's health industry to a higher level.
Ⅶ Blockchain and artificial intelligence will become the twin prides of the world in the future
Blockchain and artificial intelligence will become the twin prides of the ages in the future
Our current era needs change , innovation is needed, and blockchain, artificial intelligence, and new retail are the products of the innovation of the times that have become popular in recent years. These are all things that we are proud of. Blockchain and artificial intelligence have become the two most discussed concepts in 2018. Blockchain and artificial intelligence, both have loyal supporters in various industries. Which technology better represents the future development direction of technology?
In the past year, blockchain has An epoch-making technology has entered the public eye dazzlingly. It is considered to be the most likely technology to bring about disruptive changes at present, and is enthusiastically pursued by venture capital and capital with keen sense of smell.
Whether AlphaGo beats the human Go world champion, unmanned supermarkets open stores, or self-driving cars continue to hit the road, artificial intelligence has become the protagonist of daily news. With Google announcing the establishment of AI China in China Center, promoting the development of artificial intelligence has been written into the government work report. Today, China has become a major player in the world's artificial intelligence industry. 2017 was a wonderful year and was called the "first year of application" of blockchain and artificial intelligence. It can be predicted that blockchain and artificial intelligence will still be in the spotlight in 2018, attracting great attention from all parties.
So what exactly are blockchain and artificial intelligence? Blockchain is a decentralized medium that brings an innovative value storage and circulation model, while artificial intelligence makes machines like humans Create value, it is a new value creation system. Therefore, blockchain represents the future production relations, and AI represents the future productivity. From the popularity of "blockchain at three o'clock" in the circle of friends in the early morning, to the 2018 government work report's extensive explanation of artificial intelligence and blockchain, these two cutting-edge technologies that have firmly captured people's attention are so different. So much so that any attempt to combine the two will inevitably arouse the curiosity and doubts of the world.
Blockchain and blockchain technology are two different circles. We often say that the currency circle and the chain circle are a common division. The currency circle discusses the growth value of the currency, while the chain circle discusses the Pure technology, so sometimes it is said that the concept of blockchain is greater than blockchain technology. In fact, blockchain technology is relatively not difficult.Technology can be used in many places, but it is precisely its technology that sometimes limits its development. On the contrary, the problem faced by artificial intelligence is how to coexist with humans. Artificial intelligence is promoting the progress and development of the times in many aspects, but human society is not really ready to welcome the arrival of the era of artificial intelligence, whether it is in terms of human consciousness, ethics, laws and regulations, or social management. There is still a long way to go.
The rapid advancement of artificial intelligence technology forces humans to develop further and innovate continuously instead of standing still.
Ⅷ How to grab crowdfunding on the blockchain
How to connect the PHP website to the blockchain crowdfunding
How to connect the PHP website to the blockchain crowdfunding, based on Blockchain crowdfunding platform, methods and processes
Feng Xuexuan
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This invention belongs to The field of crowdfunding, especially involving a blockchain-based crowdfunding platform and method.
Background technology:
Currently, there are a series of critical illness fundraising systems on the market, such as Shuidichi, EasyCho, and Wuyouchi. Patients can raise funds on these critical illness fundraising systems. . These critical illness fundraising systems claim to not charge any handling fees, but many people cannot believe this. After all, any company wants to make a profit. No one dares to publish remittance records. There is the possibility of secret operations, which has a lot of credibility. lacking.
Technical implementation elements:
The purpose of this invention is to overcome the shortcomings of the existing technology and provide a crowdfunding platform and method based on blockchain, using blockchain Each fundraising transaction record is recorded, and anyone can query the transaction records to resolve donors' concerns.
The purpose of this invention is achieved through the following technical solutions: a blockchain-based crowdfunding platform, including:
Patient module, used by patients in crowdfunding Publish crowdfunding information on the platform;
The review module is used to review the crowdfunding information released by the patient;
The promotion module is used to review the crowdfunding information that has passed the review Publish and promote crowdfunding information;
Donation module, used by donors to use digital currency to donate to patients’ crowdfunding accounts;
Blockchain module, used Used to record data information in the crowdfunding process;
The processing module is used to establish a crowdfunding account in the blockchain module for patients whose crowdfunding information has passed the review, and after the fundraising deadline Convert the funds in the crowdfunding account into cash flow and remit it to the patient's bank account based on the current currency exchange rate; and use it to transfer the patient's crowdfunding information, donor's donation information and remittance to the patient's bank account The remittance information is recorded in the blockchain module;
The query module is used toQueryers view crowdfunding information, donation information and remittance information.
Preferably, the blockchain-based crowdfunding platform also includes:
A reporting module for whistleblowers to report crowdfunding information released by patients;
The verification module is used to verify the reporting information of the whistleblower.
Preferably, the patient module includes:
Registration sub-module, used by patients to register platform accounts;
Login sub-module, used Log in to the platform account on the patient side;
The information release sub-module is used by the patient side to publish crowdfunding information after logging in to the platform account.
Blockchain-based crowdfunding methods include:
Patients publish crowdfunding information on crowdfunding platforms;
Crowdfunding platforms Review the crowdfunding information released by the patient. If the review passes, a crowdfunding account will be established for the patient on the blockchain module, and the patient's crowdfunding information will be recorded in the blockchain module. on;
Publish and promote the approved crowdfunding information;
Donors use digital currency to donate to the patient’s crowdfunding account, the crowdfunding platform Record the donor's donation information on the blockchain module;
After the patient's fundraising ends, the crowdfunding platform will transfer the funds in the patient's crowdfunding account based on the current currency exchange rate. The funds are converted into cash flow and said cash flow is transferred to the patient's bank account.
Preferably, the blockchain-based crowdfunding method also includes:
Inquiries check the patient’s crowdfunding information and donor donations through the crowdfunding platform Information and remittance information from the crowdfunding platform to the patient's bank account.
Preferably, the blockchain-based crowdfunding method also includes:
The reporter reports the crowdfunding information released by the patient;
< br />The crowdfunding platform will verify the crowdfunding information released by the patient based on the reporting information of the reporter. If the report is true, the crowdfunding information will be revoked and the donation in the patient's crowdfunding account will be returned to the corresponding amount. Donors.
Preferably, the method of promoting the approved crowdfunding information includes one or more of app promotion, mini program promotion and circle of friends promotion.
The preferred blockchain-based crowdfunding method also includes: if the donor does not have digital currency, open an account for the donor on the crowdfunding platform, and then convert the funds according to the current exchange rate for the corresponding digital currency.
The beneficial effects of the present invention are:
(1) In the present invention, all fundraising data are recorded in the blockchain.The non-tamperable nature of blockchain data makes fundraising data open and transparent. Users can easily view each transaction record of crowdfunding, making all donation details open and transparent, which helps eliminate the concerns of donors and patients about black-box operations. ;
(2) In the solution of the present invention, donations of digital currencies are accepted, thereby allowing digital currencies to participate in public welfare services.
Explanation of drawings
Figure 1 is a schematic diagram of the blockchain-based crowdfunding platform;
Figure 2 is a blockchain-based crowdfunding platform Process diagram of the crowdfunding method.
Detailed embodiments
The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the implementation of the present invention. examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without any creative efforts fall within the scope of protection of the present invention.
Refer to Figure 1-2, the present invention provides a blockchain-based crowdfunding platform and method:
As shown in Figure 1, the blockchain-based crowdfunding platform The fundraising platform includes patient module, review module, promotion module, donation module, processing module, query module, blockchain module, reporting module and verification module, etc.
The patient module includes a registration sub-module, a login sub-module and an information release sub-module. The registration sub-module is used by the patient to register a platform account. When registering, the patient sets the corresponding account name and login password. One account name can only be used once in the entire fundraising platform, that is, there cannot be two identical account names. The login sub-module is used by the patient to log in to the platform account. The patient logs in to the corresponding platform account according to the account name and login password. The crowdfunding platform verifies whether the account name and login password match. If they match, the patient logs in to the corresponding platform account successfully. Otherwise, it prompts to log in. fail. The information release sub-module is used by patients to publish crowdfunding information after logging into the platform account. The crowdfunding information includes the patient's real personal information, fundraising reasons and supporting materials, fundraising amount, fundraising time, etc.
The review module is used to review the crowdfunding information released by the patient. If there are problems such as incomplete data, incorrect data or falsified data in the crowdfunding information, the crowdfunding information will be Dismiss directly.
The promotion module is used to publish and promote the approved crowdfunding information. The methods for promoting the approved crowdfunding information include app promotion, mini program promotion and circle of friends promotion. one or more.
The donation module is used by donors to make donations to the patient’s crowdfunding account.
The processing module includes a crowdfunding account creation sub-module, a fund processing sub-module and an information recording sub-module. The crowdfunding account creation submodule is used in the blockchain module forPatients whose crowdfunding information has been reviewed will create a crowdfunding account. The fund processing sub-module is used to convert the funds in the crowdfunding account into cash flow based on the current currency exchange rate after the fundraising deadline, and then remit the cash flow to the patient's bank account. The information recording sub-module is used to record the patient's crowdfunding information, donor's donation information and remittance information to the patient's bank account in the blockchain module.
The query module is used by the queryer to view the crowdfunding information, donation information and remittance information.
The blockchain module is used to record crowdfunding information, donation information and remittance information, and to establish crowdfunding accounts. The process of recording information by the blockchain module is: creating a transaction (tx); broadcasting the transaction (tx) through the p2p network; verifying the transaction (tx); broadcasting the verification result of the transaction (tx) through the p2p network; The transaction (tx) is written to the ledger.
The reporting module is used by whistleblowers to report crowdfunding information released by patients.
The verification module is used to verify the reporting information of the reporter. If the report is true, the crowdfunding information will be revoked and the donation in the patient's crowdfunding account will be returned to the corresponding amount. Donors.
The blockchain-based crowdfunding platform also includes an account opening module, which is used to provide digital currency account opening functions. If the donor does not have digital currency, he or she can open an account for the donor on the crowdfunding platform. operation, and then convert the funds into the corresponding digital currency based on the current exchange rate.
As shown in Figure 2, the blockchain-based crowdfunding method includes:
s1. The patient publishes crowdfunding information on the crowdfunding platform.
Before step s1, it also includes: the patient registers a platform account on the crowdfunding platform, and the patient logs in to the platform account.
s2. The crowdfunding platform will review the crowdfunding information released by the patient. If the review is passed, a crowdfunding account will be established for the patient on the blockchain module and all information will be transferred to the patient. The patient’s crowdfunding information is recorded on the blockchain module.
s3. Publish and promote the approved crowdfunding information. The ways to promote the approved crowdfunding information include one or more of app promotion, mini program promotion and circle of friends promotion.
s4. The donor uses digital currency to donate to the patient’s crowdfunding account, and the crowdfunding platform records the donor’s donation information on the blockchain module. Donors transfer funds based on the patient's account address (in the crowdfunding information) provided by the crowdfunding platform. They can add remark information when transferring; they only need to provide the patient's account address when transferring, and any error in the transfer cannot be withdrawn.
s5. After the patient’s fundraising ends, the crowdfunding platform will convert the funds in the patient’s crowdfunding account into cash flow based on the current currency exchange rate, and transfer theThe cash flow is transferred to the patient's bank account.
In this embodiment, crowdfunding information, donation information, remittance information, etc. are recorded in the blockchain module, and the non-tamperable characteristics of blockchain data are used to prevent relevant information from being tampered with and ensure that Ensure the authenticity of relevant recorded information.
The blockchain-based crowdfunding method also includes:
Inquiries can check the patient’s crowdfunding information, donor’s donation information and crowdfunding information through the crowdfunding platform. The remittance information of the remittance platform to the patient's bank account.
Anyone can easily view crowdfunding information, donation information, remittance information and other records through the query module, so that relevant information can be traced and traced, making the fundraising data open and transparent, which is conducive to Eliminate the concerns of donors and patients about behind-the-scenes operations.
The blockchain-based crowdfunding method also includes: the whistleblower reports the crowdfunding information released by the patient; the crowdfunding platform uses the whistleblower’s reporting information to report the crowdfunding information released by the patient. The information will be verified. If the report is true, the crowdfunding information will be revoked and the donation in the patient's crowdfunding account will be returned to the corresponding donor.
Blockchain-based crowdfunding methods also include: If the donor does not have digital currency, you can open an account for the donor on the crowdfunding platform (that is, form a blockchain wallet for the donor ), and then convert the funds into the corresponding digital currency based on the current exchange rate.
The above are only preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various Other combinations, modifications and environments can be made within the scope of the ideas described herein through the above teachings or technology or knowledge in related fields. Any modifications and changes made by those skilled in the art that do not depart from the spirit and scope of the present invention shall be within the protection scope of the appended claims of the present invention.
How to connect PHP website to blockchain crowdfunding
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Ⅸ Please tell me about the classic quotes of blockchain
Wu Sangui got angry in Shanhaiguan, essentially to compete for the power to sleep with Chen Yuanyuan; the boss The essence of their mutual hostilities on the blockchain is to compete for the right to cut leeks.
Digital currencies are very popular recently, and many altcoins have grown several times or dozens of times. Many currency speculators started to get excited and clamored for "one coin, one young model". A friend asks me for itDon't follow? My point of view is simple: the gold rush, the rush to find gold, is very risky. So, let them call them "one coin, one young model". Don't follow the trend and blindly speculate in coins. We should make money from them - become young models! Be a young model! Young model!
Blockchain is a serious technology. I don’t know whether various currencies are serious or not.
If you are a woman, every time your boyfriend says something disgusting to you or promises to buy you something, you will immediately record it and send it to all your best friends, classmates, colleagues, and everyone else. The group and circle of friends make it impossible for him to deny it anymore. This is called blockchain.
I met a currency friend yesterday and asked him: "The currency market has plummeted recently, how is your sleep quality?".
At the beginning of the new semester, my son asked his father: "How to fill in the father's job column? Should I write the currency?" The father hesitated and said, "Just write shareholders of multiple listed companies."
For more classic quotes about blockchain, enter: https://www.abcgonglue.com/ask/c5d4661615823425.html?zd to view more content
