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❶ What is blockchain, how was it born, and what are the types of blockchain?

If you want to understand blockchain, you must first understand the basic structure of the program. Everything we see on the Internet is constructed through computer language. There are many kinds of computer languages, but the most basic characters that make up the language are codes, and blockchain technology is a way of applying codes, which is different from traditional centralization. The difference between the models is that the blockchain has the characteristics of immutability, privacy, security, and consensus.

There are many application scenarios for blockchain. The most successful case so far is Bitcoin, followed by electronic invoices, cross-border payments, etc. Based on the interoperability of data, it is impossible to With characteristics such as tampering, it can also be used to save some important data. As long as this data uses blockchain technology as the underlying technology, it can never be destroyed and will be saved forever. No person or institution has the ability to modify or delete it. In addition, there are certain intersections between blockchain payment and education, medical care, credit reporting, automobiles, transportation and other fields. It is a technology, not a certain product, so there is only one type of it, but with the application As the scene changes, its role is also different. It can be integrated with existing scenes in almost any field and then derive other applications.

❷ What are the classifications of blockchain and what is the structure of the blockchain?

The concept of blockchain has been quite popular recently. It comes from Bitcoin and so on. The implementation of cryptocurrency, but this technology has been gradually used in various fields. So do you know what the classifications of blockchain are? What is the structure of blockchain? Let’s follow us to find out more.
What are the classifications of blockchain?
1. Public Blockchains (PublicBlockChains)
Public Blockchain means: any individual or group in the world can send transactions, and the transactions can be effectively confirmed by the blockchain, and anyone can participate its consensus process. The public blockchain is the earliest blockchain, and it is also the most widely used blockchain at present. The virtual digital currencies of all major bitcoins series are based on the public blockchain. There is one and only one corresponding to this currency in the world. Blockchain.
2. Consortium (Industry) Blockchain (ConsortiumBlockChains)
Industry Blockchain: Multiple preselected nodes are designated within a certain group as bookkeepers, and the generation of each block is jointly performed by all preselected nodes. Decision (pre-selected nodes participate in the consensus process), other access nodes can participate in transactions, but do not participate in the accounting process (essentially still managed accounting, just become distributed accounting, how many slag points are pre-selected, how to decide each The bookkeeper of each block becomes the main risk point of the blockchain), and anyone else can conduct limited queries through the open API of the blockchain.
3. Private Blockchains (privateBlockChains)
Private Blockchain: Only use the totality of the blockchainAccounting technology is used for accounting, which can be a company or an individual, with exclusive write permission to the blockchain. This chain is not much different from other distributed storage solutions. At present (Dec2015), conservative giants (traditional finance) want to experiment with private blockchains, while public chain applications such as Bitcoin have been industrialized, and private chain application products are still being explored.
4. Sidechain (Sidechain)
Sidechain is a blockchain used to confirm data from other blockchains. Through the two-way peg (TwoWayPeg) mechanism, various assets such as Bitcoin and Ripple coins can be Transfers are realized on different blockchains at a certain exchange rate.
What is the structure of blockchain?
1. Basic network layer: The basic network layer consists of a data layer and a network layer. The data layer includes underlying data blocks and related data encryption and timestamp technologies; the network layer includes distributed networking mechanisms, Data dissemination mechanism and data verification mechanism, etc.
2. Intermediate protocol layer: The intermediate protocol layer consists of a consensus layer, an incentive layer, and a contract layer. The consensus layer mainly includes various consensus algorithms of network nodes; the incentive layer integrates economic factors into the blockchain technology system. , mainly including the issuance mechanism and distribution mechanism of economic incentives; the contract layer mainly includes various scripts, algorithms and smart contracts, which is the basis of the programmable features of the blockchain.
3. Extension layer: This layer is similar to a computer driver and is designed to make blockchain products more practical. There are currently two categories. One is various trading markets, which are important channels for exchanging legal currency for cryptocurrency. They are simple to implement, get money quickly, and have low costs, but the risks are also high. The second is the expansion implementation in a certain direction. For example, based on the Yishu side chain, it can provide customized services for third-party publishing organizations, forum websites and other content producers.
4. Application service layer: As the most important link in the blockchain industry chain, the application service layer includes various application scenarios and cases of blockchain, including programmable currency, programmable finance and programmable society.
The above are the blockchain classifications brought to you by the editor? What is the structure of blockchain? of the entire content.

❸ What are the characteristics of blockchain?

Characteristics of blockchain: 1. Security: not subject to attack by any person or entity; 2. No information can be tampered with; 3. Traceable, All nodes in the network are accessible; 4. Decentralized, no third party. Regarding blockchain news, you can learn about it at Crypto Finance.

❹ What is blockchain

What is blockchain

What is blockchain? Many people are confused about what blockchain is. It is not very clear, and some people have even never heard of it. In fact, blockchain is a common one. I have compiled relevant information about what blockchain is for everyone.

What is blockchain 1

Speaking of blockchain, we have to mention its twin brother-Bitcoin.

Going back in timeGo back exactly 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. This way you won't be able to do anything sneaky.

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" (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 2

From 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 saves all the above information and then encrypts 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 any person or entity, and the data is completely replicated (distributed) 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 dynamic, easily scalable and often virtualized resources through the Internet, but it is often a centralized organization that provides a cloud computing platform. 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 3

Advantages of blockchain

Decentralized, it does not require the intervention of a third party and 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, the system except the private information of all parties isIn addition to encryption, blockchain data is open to everyone. Anyone can query blockchain data and develop related applications through the public interface, 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.

❺ What are the characteristics of blockchain

There are five main technical characteristics of blockchain, namely: decentralization, information cannot be tampered with, openness and transparency, collective maintainability, and reliable database. It can be used in many aspects, for example, let’s take a rental agency. In the past, the agency had information about the property and the tenants. Moreover, some unscrupulous agents would change the information at will, just to make money in the middle. More agency fees. And if a blockchain is built and applied in the rental field, then the property information will be filled in by the landlord, and the tenant's information will be filled in by the tenant. Note that once the information is filled in, it cannot be changed twice. So this is equivalent to removing the center of intermediary. Of course, we are just talking briefly. In fact, deploying such a blockchain is also very complicated.

❻ What is the concept of blockchain? Is blockchain a scam? The most complete explanation of blockchain

What is the concept of blockchain?

On October 25, 2019, the country advocated the development of blockchain. Overnight, the blockchain concept became popular.

However, many people are hearing about blockchain for the first time.

So, what is blockchain?

Let’s take a look at it from an academic perspective:

Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithms. Blockchain is essentially a decentralized database. As the underlying technology of Bitcoin, it is a series of data blocks generated using cryptographic methods. Each data block contains a batch of Bitcoin network transactions. Information, used to verify the validity of its information (anti-counterfeiting) and generate the next block.

In fact, blockchain is essentially a decentralized database.

Is blockchain the same as Bitcoin? Blockchain is not Bitcoin. The first application of blockchain is Bitcoin.

What are the characteristics of blockchain? Now let’s take a look at several characteristics of the blockchain:

1. Decentralization:

The most important feature of the blockchain is decentralization, and the blockchain system is different centralized database, it is not controlled by any person or entity. Through distributed storage, data is completely copied and distributed on multiple computers, and each node realizes information self-verification, transmission and management.

2. Non-tamperability:

The blockchain system also has the characteristics of non-tamperability. In the blockchain system, each node is the center and no information can be changed, not even the administrator can modify this information. The consensus mechanism of the blockchain has the characteristics of "the minority obeys the majority" and "everyone is equal". Only when more than 51% of the accounting nodes in the entire network are controlled, it is possible to forge a non-existent record. This situation is basically impossible, thus eliminating the possibility of fraud.

3. Publicity:

In a blockchain system, all nodes in the network can easily access information. The foundation of blockchain technology is open source. In addition to private information being encrypted, blockchain data is open to everyone. Anyone can query blockchain data and develop related applications through public interfaces, so the entire system information is highly transparent. .

4. Independence:

Because the blockchain is decentralized, it can facilitate peer-to-peer transactions, so there is no need for a third party whether in transaction or exchange of funds. of approval.

Based on consensus specifications and protocols, the entire blockchain system does not rely on other third parties. All nodes can automatically and securely verify and exchange data within the system without any human intervention.

Let’s assume an environment: 6 people live in dormitory 188 of the university

There is a ledger in the dormitory for Xiao Li, who is good at calculation, to keep accounts.

In the beginning, when the dormitory sold paper boxes or bought some public items, Xiao Li would record them in the ledger. If Xiao Li wanted to enrich himself and made false accounts, there would be less money in the account books, but no one would know.

After all, there is already a general ledger room, who would have nothing to do to keep track of the ledgers?

However, one day, because Xiao Li took more, there were obvious errors in the account book. Now, he could no longer hide it, so Xiao Li had to admit his mistake and make up the money.

So, how to solve this problem?

If blockchain is used to solve the problem:

Everyone in the dormitory takes out a ledger, and every time a transaction occurs, everyone records it in their own ledger. , such problems will not arise, because everyone is keeping accounts and can see the transaction records and final results on the ledger.

Xiao Li can’t change, you can’t change, and neither can your lower bunk. No one can change it.

This is because of the previousThe accounting model is a centralized accounting model, and the current accounting model is a decentralized accounting model. Everyone is the center and everyone is the accountant.

If someone wants to change it, it will obviously be ineffective if they only change the data on their own account book, unless they bribe three people.

So, is blockchain a scam?

With the emergence of the great benefits of blockchain, in a short period of time, the prices of blockchain-related assets have soared, and ordinary investors are becoming more and more interested in blockchain. And criminals have also taken aim at this. There are some criminals who wear the gorgeous cloak of "blockchain" and use the blockchain to commit fraud or issue digital currencies without permission, leading many people to think that the blockchain is a scam.

But in fact, it is not. Blockchain is just a technology. If it can be used well, it will benefit the public and promote the development of the industry.

In particular, the application of blockchain is very wide and can be applied to almost everything of value to human beings.

Medical field: For example, when you go to the hospital for medical treatment, you can directly check the previous medical treatment in your own database, which greatly saves medical resources and saves medical expenses for repeated examinations.

Food traceability: Do you know where the food on your table comes from? Which logistics team is transporting it? This information can be tracked using blockchain. It can provide us with a single source of truth.

Supply chain application: For example, when we buy a product on a certain product, it leaves the factory, goes to the distributor for logistics turnover, goes to the seller's store warehouse, and then reaches the consumer's hands. During these processes, if something goes wrong, only you will know about it, and others, especially consumers, will not.

Well, this is where I introduce you to the relevant knowledge about the concept of blockchain. I hope it can be helpful to you.

❼ What are the relevant terms about the blockchain industry

1. Utility token

A utility token is a utility token that serves as the right to use a specific service.

Examples of term usage

Utility tokens are predicated on using a service.

Details

You can settle the price of goods and meals instead of cash, or you can access it by having cloud storage. For utility tokens, classification of audit reports is not required.

6. Public chain

A public chain is a highly "public" blockchain where anyone can freely participate in the network.

Examples of term usage

As an infrastructure project that mediates the exchange of data between blockchains, a mechanism for exchanging data on a public blockchain will be established.

Detailed description

Used to record crypto asset (virtual currency) transactionsIn a blockchain of information, this is a mechanism for establishing transaction information by consensus among an unspecified number of participants without a specific governing entity. It is very safe to prevent forgery of transaction information, but it requires a lot of calculations, so its disadvantage is that it takes a long time to complete the transaction when there are many participants.

7. Scalability problem

Scalability problem refers to the "scalability" problem that delays transaction processing.

Examples of term usage

Spiking gas prices have highlighted Ethereum’s scalability issues.

Details

Due to the nature of blockchain, there are processing delays due to the limited amount of transaction data that can be written in a block. Sending money can take a long time, which results in higher transaction fees. Bitcoin, the first cryptocurrency to be created, has been recognized as a special problem, but efforts to solve it have been implemented, such as leveraging other technologies such as the Lightning Network and developing new blockchains.

8. GAS fee

GAS fee is the (network) transaction fee on the Ethereum blockchain.

Examples of term usage

This week, there were multiple cases of high gas bills being paid on the Ethereum blockchain despite small remittances.

Detailed description

The user-specified amount of GAS fee is a secondary reward. The virtual currency Ethereum (ETH) is used for payments. Because transactions with higher fees are processed first, GAS fees may increase as the number of transactions increases.

9. Liquidity Mining (Liquidity Mining)

Considering the provision of liquidity (currency pairs), liquidity mining refers to the granting of governance tokens in addition to interest to attract those who implement yield checks and balances .

Examples of term usage

Liquidity mining is accelerating and profitable.

Details

In liquidity mining, by storing a specific asset in a liquidity pool and providing liquidity that traders can buy and sell, the swap fee at the time can be used as Income earned. These liquidity mining originated from the largest decentralized exchange "Uniswap", and many liquidity mining contracts were born, such as Curve Finance and Balancer.

10. DeFi (Distributed Finance)

DeFi (Decentralized Finance) refers to financial services or systems that utilize blockchain and are provided without a central administrator.

Examples of term usage

Since June 2020, the DeFi market has developed rapidly.

Details

Abbreviation for "decentralized finance". Financial services provided by DeFi include issuing stable coins, lending currencies, and cryptocurrency exchanges. Many platforms use the Ethereum blockchain.

11. PoS (Proof of Stake)

PoS is a consensus algorithm that allows you to approve based on the percentage (stake) of the virtual currency you ownand the right to generate new blocks.

Examples of term usage

Ethereum co-founder Vitalik Buterin said that moving ETH’s consensus algorithm from PoW to PoS will improve security and scalability.

Details

Abbreviation for Proof of Stake. You can also consider the holding period of the virtual currency. It was born as an alternative to the “Proof-of-Work (PoW)” consensus algorithm, which requires high-performance computers to approve transactions and consumes large amounts of energy. If approved, you can receive newly issued virtual currency as a reward.

12. dApps

dApp is an application developed using open source blockchain.

Examples of term usage

South Korea’s largest Samsung Electronics app store “Galaxy Store” has started using Tron’s blockchain to process dApps.

Details

Abbreviation for "decentralized application", also known as "decentralized application" in Japanese. A major feature is that there is no centralized administrator. The most popular is the Ethereum blockchain, which is developing applications such as gaming and decentralized exchanges (DEX).

❽ What are the legal blockchains in China

1. Companies that provide blockchain technology services based on alliance chains basically comply with legal regulations. It mainly includes Tencent Blockchain, Network Super Chain, JD Blockchain, Ant Blockchain, Shanghai Wanxiang Blockchain Co., Ltd., Hangzhou Qulian Technology Co., Ltd., etc.

2. Companies focusing on blockchain information services, such as blockchain information, blockchain communities, digital currency market software, etc. It mainly includes Babbitt, chain nodes, non-small accounts, etc.

3. Companies that produce mining machines and provide related computing services, such as Bitmain, Canaan, Yibang International, etc.
Extended information:
Price-to-book ratio: refers to the ratio of stock price per share to net assets per share. The price-to-book ratio can be used for investment analysis. Generally speaking, stocks with a lower price-to-book ratio have higher investment value. On the contrary, stocks with lower investment value.
Opening price: 9:15-9:25 am is the call auction time. During the call auction period, the exchange's automatic matching system only stores but does not match. When the application bidding time ends, the matching system will based on the call auction. In principle, the opening price of the stock on that day is generated. According to the regulations of the Shanghai Stock Exchange, if there is no transaction of a certain security within half an hour after the market opens, the closing price of the previous day will be the opening price of the day. Sometimes there is no transaction for a certain security for several consecutive days. The stock exchange will put forward a guide price based on the price trend of the customer's order for buying and selling the security, and then it will be used as the opening price after the transaction is completed. The average price or average offering price of securities traded over the counter on the day before listing on the first day of listing is the opening price.
Close: The closing price refers to the transaction price of the last transaction of a certain security before the end of one day's trading activities on the stock exchange. If there is no transaction on that day, the last transaction price will be used as the closing price.Because the closing price is the standard for the current day's market and the basis for the opening price of the next trading day, it can be used to predict future securities market conditions. Therefore, when investors analyze the market, they generally use the closing price as the basis for calculation.
Trading: It means that investors do not actively buy and sell, but adopt a wait-and-see attitude, causing the stock price to change very little on the day. This situation is called trading.
Consolidation: It means that after a period of sharp rise or fall, the stock price begins to fluctuate slightly and enters a stage of stable change. This phenomenon is called consolidation, and consolidation is the preparation stage for the next big change. Panjian The stock price rises slowly, which is called Panjian. A slow decline in the stock price is called a soft market. Retracement refers to the phenomenon that during the rising process of stock price, it temporarily falls back due to excessive rise. The number of transactions refers to the number of transactions of various stocks on the day. Trading volume refers to the total price of each stock traded on the day. The last bid price refers to the price that buyers want to buy after the market closes that day. The last bid price refers to the seller's asking price after the market closes that day.