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1. What is blockchain and how to make money with blockchain

Blockchain is a term in the field of information technology. In essence, it is a shared database, and the data or information stored in it has the characteristics of "unforgeable", "full traces left", "traceable", "open and transparent" and "collectively maintained". Based on these characteristics, blockchain technology has laid a solid foundation of "trust" and created a reliable "cooperation" mechanism, which has broad application prospects.
The ways to make money in the blockchain are as follows:
1. Coin speculation. Coin speculation is like stock speculation. Coin speculation is the lowest threshold for making money in the blockchain;
2. Vendors, district Blockchain is a global market. Like small traders, you can move from a low-price platform to a high-price platform to sell and earn the difference;
3. Earn commissions for promotion. The blockchain method is to register first Exchange account, generate your own invitation link, and then promote it. If someone registers the exchange through your link and generates transactions, you can get a commission;
4. Mining, "mining" in Bitcoin is The accounting process;
5. Technical support, providing blockchain technical support to some teams and enterprises;
6. Opening a trading website and charging handling fees;
7. Developing wallets and wallets It is the infrastructure of the blockchain, just like the "Alipay" or "WeChat Pay" of the blockchain;
8. Be a blockchain project or infrastructure equipment supplier.

Warm reminder: The above explanation is for reference only and does not make any suggestions. There are risks in entering the market, so investment needs to be cautious. Before making any investment, you should ensure that you fully understand the investment nature of the product and the risks involved. After understanding and carefully evaluating the product, you can make your own judgment on whether to participate in the transaction.
Response time: 2020-12-02. For the latest business changes, please refer to the official website of Ping An Bank.
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2. What is blockchain technology? How it is changing business and financial models

Blockchain technology is a distributed ledger technology that allows multiple participants to jointly maintain a Secure, transparent and immutable records. Blockchain technology was originally designed for the digital currency Bitcoin, but is now widely used in many other fields.

The core features of blockchain technology include:

Decentralization: Blockchain has no central control agency, and data is distributed on various nodes in the network, which makes it decentralized. The centralization feature reduces the risk of single points of failure.

Transparency: Transaction records on the blockchain are public to all participants, and anyone can view these records. This helpsHigh trust and reduced fraud risk.

Immutable: Once a transaction is recorded on the blockchain, it cannot be easily modified or deleted. This guarantees data integrity and security.

Smart contracts: Transactions on the blockchain can be automatically executed to implement "smart contracts", which automatically execute corresponding operations when specific conditions are met. This helps simplify complex business processes and reduce costs.

Blockchain technology has had a profound impact on business and financial models, which is mainly reflected in the following aspects:

Reducing costs: Blockchain technology can reduce intermediary links and reduce costs. Transaction costs and operating costs. For example, by adopting blockchain for cross-border payments, remittance fees can be significantly reduced.

Improving efficiency: The automation and smart contract features of blockchain technology help improve the efficiency of business processes, reduce manual intervention, and reduce error rates.

Enhance trust: The transparency and non-tamperability of blockchain technology help to establish a reliable trust system, reduce the risk of fraud, and provide better protection for commercial activities.

Innovative business models: Blockchain technology has spawned many new business models, such as decentralized finance (DeFi), digital asset trading, supply chain finance, etc. These new business models have brought disruptive changes to existing industries.

In short, blockchain technology, as an emerging technical means, is gradually changing the landscape of business and finance. With the continuous development of technology and the in-depth promotion of applications, blockchain is expected to have a more extensive and far-reaching impact in the future

3. How to use blockchain to solidify, access, verify evidence, and improve Evidence effectiveness

Using blockchain to solidify, access, and verify evidence can improve the effectiveness of evidence and prevent evidence from being tampered with or lost. The following are the specific steps:

1. Evidence solidification: record the hash value of the evidence on the blockchain, and use the non-tamperability and decentralization characteristics of the blockchain to ensure the integrity of the evidence sex and authenticity. For example, a public chain or a private chain can be used to solidify evidence. The public chain can better ensure the fairness and transparency of the evidence, while the private chain can better protect the privacy of the evidence.

2. Evidence access: Utilize the distributed storage characteristics of the blockchain to store evidence on multiple nodes to ensure the reliability and durability of the evidence. For example, decentralized storage protocols such as IPFS (InterPlanetary File System) can be used to store evidence, and smart contracts can be used to control access rights to evidence.

3. Evidence verification: Taking advantage of the decentralized and open and transparent features of the blockchain, the authenticity and integrity of the evidence can be easily verified. For example, you can use a blockchain browser to view the hash value or transaction record of the evidence, or you can use smart contracts to verify the authenticity and integrity of the evidence.

It should be noted that the use of blockchain for evidence solidification, access, and verification needs to comply with relevant laws, regulations, and privacy protection principles. At the same time, the security and reliability of the blockchain technology itself need to be considered.

4. How to monetize blockchain and how to make money from blockchain investment

In recent years, with the development of blockchain technology, more and more investors have begun to pay attention to blockchain Chain investment, they hope to get more benefits from investing in the blockchain. But the question is, how to realize blockchain investment and how to make money are the issues that investors are most concerned about. Next, let’s introduce how blockchain can be monetized and how to make money by investing in blockchain.

1. Methods of monetizing blockchain

1. Mining income: Mining is the most commonly used method of monetizing for blockchain investors. Investors can Earn income, the size of which depends on the investor's investment amount and the efficiency of mining.

2. Transaction income: Transaction is the most commonly used method of monetization for blockchain investors. Investors can obtain income through buying and selling. The size of the income depends on the investor’s investment amount and the efficiency of the transaction.

3. Loan income: Loan is the most commonly used method of cashing out by blockchain investors. Investors can obtain income through borrowing. The size of the income depends on the investor’s investment amount and the efficiency of lending.

4. Investment income: Investment is the most common way for blockchain investors to realize their profits. Investors can obtain income through investment. The size of the income depends on the investor’s investment amount and the efficiency of the investment.

2. How to make money by investing in blockchain

1. Reasonable investment: Before investing in blockchain, investors need to fully understand the development trend of blockchain, and investment opportunities in the market in order to make more informed investment decisions.

2. Reasonable investment portfolio: When investing in blockchain, investors should construct a reasonable investment portfolio based on their own risk tolerance in order to obtain higher returns.

3. Reasonable investment strategy: When investing in blockchain, investors should formulate a reasonable investment strategy based on market changes in order to obtain higher returns.

4. Reasonable investment timing: When investing in blockchain, investors should grasp the timing of investment according to market changes in order to obtain higher returns.

3. Risks of blockchain investment

1. Technical risks: Blockchain technology is an emerging technology, and its development trend is still unclear. Investors are investing When using blockchain, technical risks should be fully considered.

2. Market risk: The blockchain market is a very unstable market with large price fluctuations. Investors should fully consider market risks when investing in blockchain.

3. LawLegal risks: Blockchain investment is restricted by different laws and regulations. Investors should fully consider legal risks when investing in blockchain.

4. Operational risk: Blockchain investment involves complex technical operations. Investors should fully consider operational risks when investing in blockchain.

4. Summary

As can be seen from the above introduction, the ways in which blockchain can be monetized include mining income, transaction income, lending income and investment income; blockchain The ways to make money by investing include reasonable investment, reasonable investment portfolio, reasonable investment strategy and reasonable investment timing; the risks of blockchain investment include technical risk, market risk, legal risk of loss and operational risk. Investors should fully consider these risks when investing in blockchain in order to obtain higher returns.

5. Where to get 360 Block Cat

360 recently launched its own blockchain product - 360 Block Cat, but many friends still don’t know how to get it Block Cat, then let me introduce to you how to get 360 Block Cat.
360 Block Cat Introduction
The first batch of 360 Block Cat app is limited to 50,000 pieces. According to the breeding order, "Block Cat" is divided into 0 generations, 1 generations, 2 generations, etc., among which the first generation is the most precious.
During the 360 ​​Block Cat event, users who successfully submit an appointment can adopt a 1st generation cat; if they invite and get the help of 10 friends, they can adopt a very precious 0th generation cat. This event only records raids. Users make reservations and forward information about adopting block cats. Only after the Blockcat platform and products are officially launched can users actually receive their adopted Blockcat.
360 Block Cat Receiving Method
1. Make an appointment to adopt a 1st generation Block Cat
1. During the event period, the user clicks the "Reserve Now" button at the bottom of the page, fills in the user information, and successfully submits the Block Cat reservation After registration for adoption, you can adopt a first-generation block cat.
2. Each user (the same WeChat ID, mobile phone number, device, and IP address is considered the same user) can adopt up to 1 first-generation block cat named Paitan through reservation.
3. Each user can only make one reservation, and repeated reservations are invalid.
360|

6. Tutorials for getting started with blockchain

However, there are very few simple and easy-to-understand introductory articles. What exactly blockchain is and what makes it special is rarely explained.
Next, I will try to write a best-understood blockchain tutorial. After all, it is not difficult. The core concept is very simple and can be explained clearly in a few sentences. I hope that after reading this article, you will not only understand the blockchain, but also understand what mining is, why mining is getting more and more difficult, and other issues.
It should be noted that I am not an expert in this area. Although I have been paying attention to it for a long time, my detailed understanding of blockchain started at the beginning of this year. You are welcome to correct any errors or inaccuracies in the article.
1. The essence of blockchain
BlockchainWhat is it? In a word, it is a special distributed database.
First of all, the main function of blockchain is to store information. Any information that needs to be saved can be written to the blockchain and read from it, so it is a database.
Secondly, anyone can set up a server, join the blockchain network, and become a node. In the world of blockchain, there is no central node. Every node is equal and stores the entire database. You can write/read data to any node, because all nodes will eventually be synchronized to ensure that the blockchain is consistent.
2. The biggest features of blockchain
Distributed databases are not a new invention, and there have been such products on the market for a long time. However, blockchain has a revolutionary feature.
Blockchain has no administrator, it is completely centerless. Other databases have administrators, but blockchain does not. If one wanted to add auditing to the blockchain, it would not be possible because it is designed to prevent the emergence of a central authority.
It is precisely because it is unmanageable that blockchain can be uncontrollable. Otherwise, once big companies and large groups control the management, they will control the entire platform, and other users will have to take orders from them.
However, without an administrator, everyone can write data into it. How can we ensure that the data is trustworthy? What if it is modified by a bad person? Please read on, this is the wonderful thing about blockchain place.
3. Block
Blockchain is composed of blocks. Blocks are much like database records. Every time data is written, a block is created.
Each block contains two parts.
Head: records the characteristic values ​​of the current block
Body: actual data
The block header contains multiple characteristic values ​​of the current block.
Generation time
Hash of the actual data (i.e. block body)
Hash of the previous block
...
Here, you need to understand what a hash is , which is necessary to understand blockchain.
The so-called hashing means that the computer can calculate a characteristic value of the same length for any content. The hash length of the blockchain is 256 bits, which means that no matter what the original content is, a 256-bit binary number will be calculated in the end. And it can be guaranteed that as long as the original content is different, the corresponding hash must be different.
For example, the hash of the string 123 is (hexadecimal), which is 256 bits when converted to binary, and only 123 can get this hash. (Theoretically, it is possible for other strings to get this hash, but the probability is extremely low and can be approximated as impossible.)
Therefore, there are two important inferences.
Corollary 1: The hash of each block is different, and the block can be identified by the hash.
Corollary 2: If the content of the block changes, its hash will definitely change.
4. The non-modifiable nature of Hash
Blocks and hashesThere is a one-to-one correspondence, and the hash of each block is calculated based on the block header (Head). That is to say, the characteristic values ​​​​of the block header are connected together in order to form a very long string, and then the hash is calculated on this string.
Hash = SHA256 (block header)
The above is the calculation formula of block hash. SHA256 is the hash algorithm of the blockchain. Note that this formula only contains the block header and not the block body. In other words, the hash is uniquely determined by the block header.
As mentioned before, the block header contains a lot of content, including the hash of the current block body. , and the hash of the previous block. This means that if the content of the current block body changes, or the hash of the previous block changes, it will definitely cause the hash of the current block to change.
This point has great significance for blockchain. If someone modifies a block, the hash of the block changes. In order for subsequent blocks to still be connected to it (because the next block contains the hash of the previous block), the person must modify all subsequent blocks in sequence, otherwise the modified block will be removed from the blockchain . Due to the reasons mentioned later, hash calculation is very time-consuming, and it is almost impossible to modify multiple blocks in a short period of time, unless someone controls more than 51% of the computing power of the entire network.
It is through this linkage mechanism that the blockchain ensures its own reliability. Once the data is written, it cannot be tampered with. This is just like history, what happened happened, and it can’t be changed from now on.
Each block is connected to the previous block, which is where the name blockchain comes from.
5. Mining
Since synchronization between nodes must be ensured, the adding speed of new blocks cannot be too fast. Just imagine, you have just synchronized a block and are preparing to generate the next block based on it, but at this time, another node generates a new block, and you have to give up half of the calculations and synchronize again. Because each block can only be followed by one block, you can only generate the next block after the latest block. So, you have no choice but to sync as soon as you hear the signal.
So, the inventor of the blockchain, Satoshi Nakamoto (this is a pseudonym, and his true identity is still unknown) deliberately made it difficult to add new blocks. His design is that on average, the entire network can generate a new block every 10 minutes, which is only six per hour.
This output speed is not achieved through commands, but by deliberately setting up massive calculations. In other words, only through an extremely large amount of calculations can the effective hash of the current block be obtained and the new block added to the blockchain. Because the amount of calculation is too large, it cannot be done quickly.
This process is called mining, because the difficulty of calculating a valid hash is like finding a grain of sand that meets the conditions among the sand in the world. The machine that calculates hashes is called a mining machine, and the person who operates the mining machine is called a miner.
6. Difficulty coefficient
After reading this, you may have a question. People say that mining is difficult, but isn’t mining justCan you use a computer to calculate a hash? This is the strength of computers. How come it becomes so difficult and it takes so long to calculate it?
It turns out that not any hash can be used, only hashes that meet the conditions can Accepted by the blockchain. This condition is particularly harsh, causing most hashes to fail to meet the requirements and must be recalculated.
It turns out that the block header contains a difficulty coefficient (difficulty), which determines the difficulty of calculating the hash. For example, the difficulty coefficient of the 100,000th block is 14484.16236122.
The blockchain protocol stipulates that the target value (target) can be obtained by dividing the difficulty coefficient by a constant. Obviously, the greater the difficulty coefficient, the smaller the target value.
The validity of the hash is closely related to the target value. Only hashes smaller than the target value are valid, otherwise the hash is invalid and must be recalculated. Since the target value is very small, the chance that the hash is smaller than this value is extremely slim, and it may be calculated 1 billion times before it is considered a hit. This is the fundamental reason why mining is so slow.
As mentioned earlier, the hash of the current block is uniquely determined by the block header. If the hash of the same block needs to be calculated repeatedly, it means that the block header must keep changing, otherwise it is impossible to calculate different hashes. All feature values ​​in the block header are fixed. In order to make the block header change, Satoshi Nakamoto deliberately added a random item called Nonce.
Nonce is a random value. The role of the miner is actually to guess the value of Nonce so that the hash of the block header can be smaller than the target value so that it can be written to the blockchain. Nonce is very difficult to guess. At present, we can only use trial and error one by one through exhaustive methods. According to the protocol, Nonce is a 32-bit binary value, which can reach a maximum of 2.147 billion. The Nonce value of the 100,000th block is 274148111. It can be understood that the miner started from 0 and calculated 274 million times before obtaining a valid Nonce value so that the calculated hash can meet the conditions.
If you are lucky, you may find Nonce in a while. If you are unlucky, you may have calculated it 2.147 billion times without finding the Nonce, that is, it is impossible to calculate a hash that meets the conditions for the current block body. At this time, the protocol allows miners to change the block body and start a new calculation.
7. Dynamic adjustment of difficulty coefficient
As mentioned in the previous section, mining is random, and there is no guarantee that a block will be produced in exactly ten minutes. Sometimes it can be calculated in one minute, and sometimes it may take several hours. No result. Overall, with the improvement of hardware equipment and the increase in the number of mining machines, the computing speed will definitely become faster and faster.
In order to keep the output rate constant at ten minutes, Satoshi Nakamoto also designed a dynamic adjustment mechanism for the difficulty coefficient. He stipulated that the difficulty factor should be adjusted every two weeks (2016 blocks). If the average block generation speed in these two weeks is 9 minutes, it means that it is 10% faster than the legal speed, so the nextThe difficulty coefficient needs to be increased by 10%; if the average generation speed is 11 minutes, it means that it is 10% slower than the legal speed, so the subsequent difficulty coefficient must be lowered by 10%.
The difficulty coefficient is adjusted higher and higher (the target value is getting smaller and smaller), which makes mining more and more difficult.
8. Forks of the blockchain
Even if the blockchain is reliable, there is still an unresolved problem: if two people write data to the blockchain at the same time, that is to say, two people write data to the blockchain at the same time. Blocks join because they are connected to the previous block, forming a fork. Which block should be adopted at this time?
The current rule is that new nodes always adopt the longest blockchain. If there is a fork in the blockchain, it will look at which branch is behind the fork to reach 6 new blocks first (called six confirmations). Based on a block calculation of 10 minutes, it can be confirmed in one hour.
Since the generation speed of new blocks is determined by computing power, this rule means that the branch with the most computing power is the authentic blockchain.
9. Summary
Blockchain, as an unmanaged distributed database, has been running for 8 years since 2009 without major problems. This proves it works.
However, in order to ensure the reliability of data, blockchain also has its own price. The first is efficiency. You have to wait at least ten minutes to write data to the blockchain. All nodes synchronize the data, which requires more time. The second is energy consumption. The generation of blocks requires miners to perform countless meaningless calculations. This is Very energy consuming.
Therefore, the applicable scenarios of blockchain are actually very limited.
There is no management authority that all members trust
The written data does not require real-time use
The benefits of mining can make up for its own costs
If the above conditions cannot be met, then the traditional database is Better solution.
Currently, the largest application scenario (and possibly the only application scenario) of blockchain is the cryptocurrency represented by Bitcoin.

7. How blockchain empowers the transaction end

Blockchain technology can empower the transaction end by providing a more reliable, transparent and efficient transaction method. The following are some key points:
1. Decentralization: Blockchain technology allows the creation of a decentralized (not dependent on a centralized institution or third party) transaction end. Because all transactions are recorded on a distributed database and each transaction is verified, this means there is no single point of failure (such as a server crash) and transaction history cannot be tampered with.
2. Smart contracts: On the blockchain, smart contracts (automatically executed computer programs) can be created, eliminating the need to trust third-party intermediaries (such as banks or lawyers) and ensuring that all parties involved in the transaction are fully Comply with the terms of the contract. Since smart contracts have advantages in terms of trust and accuracy, they can reduce the number of disputes and effectively support transaction operations.
3. Improve transaction efficiency: Blockchain technology improves transaction processing speed. In traditional financial or trading systems, cross-border transactions may require confirmation by multiple banks, intermediaries and regulatory agencies, but with blockchain technology, all transactions can be processed in real time, and the time required to complete a transaction is greatly shortened.
4. Reduce costs: Blockchain technology can reduce transaction costs. In the traditional financial system, many transactions require certain fees to be paid to intermediaries or banks, and each intermediary needs to pay certain management fees. However, through blockchain technology, the number of intermediaries can be significantly reduced, making transactions cheaper and more economical.
In summary, the main way blockchain technology empowers the transaction side is to provide decentralized mechanisms, smart contracts, increase transaction speed and reduce costs, etc. With the new Internet, "blockchain+" has become an unstoppable trend, and there will be more and more practical application scenarios in the future.