为什么区块链主网高度要升级

区块链技术作为一种新型的数据存储和传输技术，具有安全性、去中心化、可信任、可追踪等特点，在金融、政府、企业等领域得到了广泛应用。为了满足不同领域的应用需求，区块链主网需要不断升级拓展。本文将介绍区块链主网升级拓展的三个关键词：可扩展性、可更新性和安全性。

1.可扩展性：

可扩展性是指区块链主网能够根据不同业务场景的需求，在基础网络上拓展出新的功能，以支持更多的应用场景。比如，基于以太坊的智能合约可以实现去中心化的资产交易，而基于以太坊的智能合约又可以拓展出新的功能，比如去中心化的文件存储、投票系统等。因此，可扩展性是区块链主网升级拓展的重要方面。

2.可更新性：

可更新性是指区块链主网可以实现迭代式的更新，以保持网络的稳定性和安全性。随着科技的发展，区块链主网的技术也在不断进步，新的技术可以替代旧的技术，以提高网络的性能和安全性。比如，比特币的网络从最初的比特币核心协议，到现在的segwit和lightning网络，都是不断更新的。因此，可更新性是区块链主网升级拓展的重要方面。

3.安全性：

安全性是指区块链主网在升级拓展过程中，可以保证网络的安全性。安全性是区块链的基础，如果网络不安全，那么网络上的数据就不能得到有效的保护，用户的资产也可能受到损害。因此，安全性是区块链主网升级拓展的重要方面，其中包括数据安全、网络安全、智能合约安全等。

总之，可扩展性、可更新性和安全性是区块链主网升级拓展的三个重要关键词，只有保证这三个方面，才能使区块链主网具有更高的可靠性和安全性，从而更好地满足不同领域的应用需求。

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❶ What earth-shaking changes will blockchain bring and how will it change life?

In addition to being used in the financial industry, blockchain is also used in other fields. In fields such as law, retail, Internet of Things, and medical care, blockchain can solve trust problems, no longer rely on third parties to establish credit information sharing, and improve the operating efficiency and overall level of the entire industry. Extremely high productivity will connect all people and machines in this society into a global network, and mankind will accelerate towards an era where goods and services are almost free. Perhaps by the second half of the 21st century, capitalism will decline and areas The decentralized collaborative sharing model of the blockchain will replace it and become the new model that dominates economic life.

Blockchain is the best technical means for this new collaborative sharing model. The infrastructure of blockchain allocates global resources in a decentralized manner, making blockchain an ideal technical framework for promoting social and economic development. The operational logic of blockchain lies in its ability to optimize peer-to-peer resources, global collaboration, and the sensitivity that fosters and encourages the creation of social capital in society. Establishing various platforms for blockchain can encourage a collaborative culture to the greatest extent, which complements the original shared model and will make it the decisive economic model of the 21st century.

❷ What is blockchain expansion

Expansion is when a container or carrier is not enough to support or carry the existing demand for things, we expand the capacity or carrier of the container It is a means of increasing the volume of objects to meet the growing demand, thereby alleviating the pressure on current containers or objects.
At the beginning of the birth of Bitcoin, Bitcoin founder Satoshi Nakamoto did not specifically limit the size of blocks. The maximum block size could reach 32MB. At that time, the average block size was 1~2KB.
At that time, there were few Bitcoin users and the transaction volume was not that large, which did not cause block congestion. However, with the linear rise in the price of Bitcoin from 2013 to the present, more and more users have caused congestion on the Bitcoin network. The problem of rising user transaction fees gradually emerged.
Up to now, there is a backlog of hundreds of thousands of transactions on the Bitcoin blockchain at its peak. The average transaction fee of Bitcoin has increased 376 times since September 2010. The processing speed of 7 transactions per second is obviously too high. To meet user needs, the Bitcoin community began to explore how to “expand” Bitcoin.
By modifying the underlying code of Bitcoin, the purpose of improving transaction processing capabilities is achieved.
There are two development and design solutions for Bitcoin expansion itself, namely first-layer and second-layer expansion technologies.
· The first layer of expansion technology is to improve the blockchain itself, making the blockchain itself faster and larger in capacity. In general, it is to change the content of the consensus part of the blockchain.
· The purpose of the second-layer expansion technology is to move calculations off-chain, that is, to solve problems through side-chain technology.
Expansion Agreement and Outcome
Expansion Agreement generally requires the support of miners.It can be divided into methods such as modifying the block size, soft fork, hard fork, and segregated witness.
Take Bitcoin as an example:
Bitcoin is now split into the large block Bitcoin Cash (BCH) and Segregated Witness. Segregated Witness is now recognized as Bitcoin in the market, and the big block coin is named Bitcoin Cash. It is foreseeable that in the future development direction, Bitcoin will be dominated by off-chain transactions. Including Lightning Network and side chains. These two new things are currently immature, but many people have high hopes.
Bitcoin will develop a large number of Segregated Witness transactions and make more derivative technologies based on Segregated Witness. It is most likely that technology will drive Bitcoin forward.
Bitcoin Cash will focus on on-chain transactions, focus on developing currency functions, reduce transaction friction as the main method, and profit from a wider range of on-chain users as the main development direction.
The Xueshuo Innovation Blockchain Technology Workstation under Lianqiao Education Online is the only approved "Blockchain Technology Professional" pilot of the "Smart Learning Workshop 2020- Xueshuo Innovation Workstation" launched by the School Planning, Construction and Development Center of the Ministry of Education of China. workstation. The professional base is based on providing students with diversified growth paths, promoting the reform of the training model integrating professional degree research, production, and research, and building an applied and compound talent training system.

❸ How to introduce the blockchain in 3 minutes in a simple and easy-to-understand manner, and what its commercial value will be in the future

There is a real joke, an engineer from Ant Financial, he wrote I submitted a blind date resume, and the job description in it was "code farmer", but no one clicked it for a long time. Later, he changed his work experience to "blockchain" and received 381 love letters at once.

From workers in high-tech industries to square dancing aunties, it seems that everyone is participating in the blockchain carnival. So what exactly is the seemingly mysterious blockchain? After reading the following content, you will have completed the journey from beginner to beginner.

1. What is blockchain?

To put it bluntly, the blockchain is "everyone keeps accounts together." Any database needs a big housekeeper to be responsible for "accounting" (maintaining the system and entering data). But after using blockchain technology, the concept of this "central steward" disappears, and each of us can participate in accounting. So the question is, whose record will ultimately prevail? Of course, it is the person who completes the work well and quickly. A system that strictly adheres to fairness will select this person based on the algorithm, write the contents recorded by him into the ledger, and send the contents of the ledger during this period to everyone in the system. of others to perform backups.

2. Blockchain technologyWhat's so great about it?

Any new thing must have unique advantages if it wants to develop rapidly, and the same is true for blockchain technology. First of all, blockchain technology ensures the security of the system. In the absence of a central steward, everyone is a defender of the home, which means that destroying some nodes has no impact on the system at all. Second, the recording process cannot be cheated. Everyone in the blockchain system has the same ledger, and the entire process is open and transparent. The system will determine the final result based on the opinions of the majority. It is difficult for an individual to hack into so many computers at the same time, and it is meaningless to just modify one's own results. Who would do such a thankless task? Third, and most importantly, the blockchain completely abandons the existence of "credit intermediaries". Credit intermediaries are the platforms we must pass through when transferring money, such as traditional banks. Now any two strangers can directly complete mutual trust transfers, and the efficiency has been improved not only a little!

3. What is the use of blockchain technology? ?

As mentioned earlier, the main advantages of blockchain are that it does not require intermediary participation, the process is efficient and transparent, the cost is very low, and the data is highly secure. That is to say, any industry that has needs in these three aspects can use blockchain technology. Here are a few examples:

In the banking industry, the use of blockchain technology is equivalent to updating a digital, secure and tamper-proof General ledger books. In fact, Swiss bank UBS and Barclays Bank in the UK have already begun experiments, hoping to use it as a way to accelerate back-end system functions and clearing and settlement capabilities. Some institutions in the banking industry claim that blockchain may reduce middleman costs by 20 billion.

In terms of car rental, blockchain also has great potential. A future customer selects the car they want to lease, entering it into the blockchain's public ledger; then, sitting in the driver's seat, the customer signs the lease agreement and insurance policy, while the blockchain updates the information simultaneously. This is a foreseeable future for car sales and car registrations.

In terms of medical and health care, blockchain technology allows hospitals, patients and all parties in the medical benefit chain to share data in the blockchain network, and Don’t worry about data security and integrity. This means more accurate diagnosis, more effective treatment, and an improvement in the health system’s overall ability to deliver cost-effective care.

Blockchain is not cold-blooded. It has been implemented in applications that are closely related to our lives. For example, the application of Ant blockchain ranges from public welfare, to mutual insurance, to traceability of product authenticity, to traceability of rental housing.

In 2018, blockchain will "return to the world."

Blockchain, do you really understand it? Since it says three minutes, let’s give a simple answer.

1. What is blockchain;

2. What are the benefits of blockchain;

3. What are the uses of blockchain;

4. Blockchain technology and existing problems;

Let’s first look at the first question: What is blockchain

Let’s look at it literally. Blockchain is called Blockchain in English. This is a very good word. The English name is well chosen and the Chinese translation is also very beautiful.

1. What is a "block"?

You can think of it as a record, or anything, which forms such a record during the production stage. This thing can be any physical or virtual object in the Internet of Everything.

For example, if you generate a Bitcoin, which is a thing, it actually corresponds to a block. This block is a record of what it is.

When you produce a bottle of medicine in the future, a block is actually generated when this bottle of medicine is produced. When it leaves the factory, it needs to be recorded once, and this corresponds to it one-to-one.

This is the first dimension.

To make it easier to understand, for example, each of us is born with a unique identifier, which is our DNA. All species in the world have different DNA. Every individual's DNA is different.

Your parents can name you Zhang San, Li Si, Wang Wu. These names can be repeated, just like a bottle of medicine, whether it is aspirin or penicillin, these can also be repeated. Famous. However, human DNA is different. Even if you have identical brothers and sisters, your DNA is different, so this is your unique identifier. And once your DNA is formed, it cannot be changed. This is a benefit of the blockchain.

2. What is "chain"? The chain is actually a process. You can think of it as a transaction process. After this bottle of medicine leaves the factory, it enters the warehouse from the workshop and passes through a certain door, and it will record the process.

Of course, this requires automatic computer recording, and the cost of human recording is too high. Then, packing is a process, and transportation to the cargo transfer station is another process. Then it is loaded into a car and transported to the wholesale station, which is the next process.

Every step of the process is recorded. From wholesale station to merchantThe store is a process, it is another process for the people in the store to receive this batch of medicines and put them on the shelves, and it is still a process for you to buy them. Finally, when the whole process is connected, you will have a way to track the entire process of this bottle of medicine and know its authenticity, because once this bottle of medicine is produced, it will be bound to the blockchain, as well as to people and people. The same is true for DNA binding, which cannot be changed, but it can be seen and detected.

The doctor can also determine whether this person is you by testing DNA. So in terms of nature, if we virtualize it, it is actually a smart contract. You have signed a sales relationship with one of your customers. Once this happens, it cannot be changed. Then everyone can only execute it. This execution process is the same as the tracking of drugs I just talked about.

Second question: What are the benefits of blockchain?

1. Mathematically speaking, it is very beautiful. It changes from the past that you had to own something before you could know its properties to that you don’t own it, but you can ask questions Learned many details about it.

Mathematically speaking, this is a perfect asymmetric situation. You can tell whether it's true or false, but you can't change it.

2. Theoretically speaking, blockchain is very safe. For example, if you participate in the process of a bottle of medicine, others cannot see this information. That is to say When you buy this bottle of medicine, you can know where it comes from, but others cannot.

For the same reason, for example, if we sign a contract, others can verify the contract. If you go to a bank for a loan, he can ask you the amount.

However, he cannot obtain this contract, and he cannot steal this contract from your computer.

Blockchain also has some very interesting properties. For example, a block chain can be divided into two at will, or several can be combined into one, etc.

3. Blockchain is transparent, which means that everyone abides by this algorithm and there is no special agreement in private. So, if you believe in this algorithm, it means you believe in me and believe that I didn't do anything fishy. I will not secretly do anything in the contract to make you suffer losses.

This is a beautiful place theoretically and mathematically.

In the third block, let’s take a look at the uses of blockchain

1. Bitcoin is a cryptocurrency, and the Ethereum currency that everyone uses now is also a cryptocurrency. Of course, you can make another one based on it, either Zhang three coins or Li four coins. As for whether it can replace the currency of the future, this is doubtful.

2. Financing, we used to divide financing into three stages: the first stage is to get a loan from the bank. If you want to open a restaurant, you need to mortgage something. The second stage is that you issue some stocks and I sell 10% of the stocks, soIf so, I can get part of the funds.

The third stage is actually crowdfunding. For example, if I want to write a book, it may cost 50,000 yuan for the publishing house to publish it. If any of you can give me 50 yuan at the beginning, I will use it in the future. Once the book is written, give everyone a copy. You will get the book, and of course I will publish it. But there is a problem. For example, I sell this book for 100 yuan and you get it for 50 yuan. What if my book sells very well, assuming I sell 100,000 copies, but you don’t seem to benefit from me? what to do?

Is there a fairer way to measure everyone's contribution? One way is to issue a cryptocurrency (ICO). When the business we do becomes bigger in the future, you can benefit from it.

3. Smart contract, for example, sign a contract. In the future, the smart contract can become like this. All the nodes in the middle are determined when the contract is signed, such as building or decorating a house for you. , your payment must be given to me at any stage of the decoration. If you accept it, no problem, the payment will be automatically given to me.

You can even sign with my supplier, which means that as soon as my money arrives in my account, I will give it to my supplier immediately. This will eliminate many triangular debt problems in the future, including the problem of arrears to migrant workers.

Blockchain can also be used for property registration, car registration, etc. Of course, another great use is gambling. In fact, gambling is the most willing to adopt new technologies because it is closely related to money.

After talking about the benefits of blockchain, let’s take a look at the technology and existing problems of blockchain.

Today’s blockchain is basically the second generation and the first generation. It is the Bitcoin generation. It has many problems. It is not a platform, but is actually a specific application.

The second generation is represented by Ethereum. It is a platform on which you can issue your own coins, and it removes the concept of mining machines, so its transaction costs will be much lower. . The reason why ICOs are everywhere today is because with Ethereum, you can issue coins. Unlike in the past with Bitcoin, you had to completely copy its formula and copy it again. Today you are on Ethereum. , it is easy to issue your own currency, just like you can easily make your App on the Android operating system today.

There are three problems with Bitcoin transactions

1. The transaction delay is very long. I have asked people who specialize in Bitcoin transactions and the delivery time ranges from two hours to two hours. Days wait, so it is very inconvenient for you to use it to launder money. After the RMB is converted into US dollars, it may fall by 20% in two days, and you will lose 20% of your money.

2. It cannot be distributed. Like Bitcoin, a few people in the early days took away a lot of its shares, so how to distribute it in the future is also a problem. No one understands it clearly, so it is difficult to use it as a currency. onecurrency. Because if it really becomes a currency that everyone uses, it will be equivalent to the first few people taking away a large part of the world's property.

3. Transaction costs are high. For example, a cup of coffee at Starbucks in the United States costs $2.50 on average. You usually pay money at the counter, and the transaction time is only one minute. If you want to use Bitcoin, you have to wait two hours before you can get your coffee, and the transaction costs are extremely high, the electricity bill alone is $20. In other words, if you pay $2.50 for coffee, the transaction cost of electricity is $20, so this is unrealistic.

Blockchain has high risks. This risk is not only a technical risk, but also a policy risk. In fact, this is also an opportunity. Whoever solves this problem will get the opportunity. Its transaction costs are also very high, so whoever can develop new underlying technologies and reduce this transaction cost will make a lot of profits in the future.

Some people say it is the next generation of the Internet. I don’t agree with this, but it will definitely be a supplement to the Internet. Some people say whether it can subvert the central bank, but this is not certain, because there is no reason why the central bank or these big banks cannot do this themselves, so those who expect it to subvert the central bank may be too happy too early.

Perhaps in the end it was these large financial institutions in the past that used the blockchain to update themselves.

Talk in the vernacular and get useful information!

Literally, blockchain is blocks and chains, and some relationship between them. It is essentially a distributed accounting method and a network database system that cannot be tampered with.

The current development directions include digital currency, payment, smart contracts, defi finance, web3 and so on. It is still in the initial stage of development and is a back-end technology. Most projects are still speculating and financing.

Today’s Afghanistan may best prove the value of Bitcoin, and there is no problem with value storage

Blockchain is not just a technology, it is a way of trust transfer, value The way it is delivered may have huge potential in the future.

Keywords: block, chain, database, ledger, Afghanistan, currency speculation, value, technology, market

First, what is a blockchain? Blocks and chains are an accounting method and a form of network data storage.

Literally speaking, blockchain refers to blocks and chains. This block actually records the transaction records of the entire network, or the execution result data of smart contracts, etc.

Every once in a while, the entire network will produce a block. This block records all transfer data, and the blocks need to be connected by some kind of "chain".

This chain is an encryption algorithm. Some information of the previous block is used to calculate some information of the next block. The links are interlocking. The latter block canTo trace back to the previous block, if you want to modify the next block, you must modify the previous block, all the way to the first block. Regarding the details of these issues, I have written many articles before. If you are interested, you can go back and take a look.

Blockchain is actually an accounting method, or a database storage method. Please pay attention to what I say below. The whole process is the operating mechanism of blockchain.

Each node in the entire network has the same status and runs the same program. This program is used to collect, encapsulate and package all transaction record data records that occurred in the entire network within a period of time. Then broadcast it to the entire network

Let’s take Bitcoin as an example. Once this packaging and encapsulation is completed, you can obtain the right to produce the block. A certain amount of Bitcoin can be issued every time a block is produced. Since the nodes in the entire network run the same program, there is no center to control everyone. Therefore, the currency issued is irrevocable and cannot be changed.

How to decide who has the right to make a block? This requires the use of the so-called consensus mechanism, which is to establish a rule and use who produces the block as the benchmark to solve the problem of network consistency. The mainstream consensus mechanisms include POW mechanism and POS mechanism. Proof of work and proof of stake. Proof of work, who does more work, and proof of equity, who stakes more assets

Pow means that everyone calculates a difficult mathematical problem together, whoever calculates it Whoever comes out has the right to produce the block. Pos means that everyone takes out their family assets as mortgage, and whoever mortgages more. It is possible to be selected as a block producing node.

The essence of this approach is that you have to pay a certain price and receive a certificate of investment, which essentially builds a kind of trust.

When all these tasks are completed, a block can be produced, and the block will be connected to the previous block one by one. This is the entire block sequence. Note that the entire blockchain world will produce many blocks, connected to one chain after another, but everyone will only recognize the longest chain, and short chains will be discarded.

To put it simply, each network node uses a program to package transactions within a period of time, and then connects the transaction blocks one after another and saves them in each node, but an encryption algorithm will be used in the process. Ensure that node information is not leaked, ensure that user information is encrypted, and ensure that the information in the block is not cracked or tampered with

Second, the block The current development of the chain, various projects and significance, at this stage are more about currency speculation, and there is no problem with value storage.

Blockchain has been developing for twelve or three years since the Bitcoin white paper in 2008. It has also experienced various evolutions and developments.

For example, now it has gone from being able to issue currency in a distributed way to now having huge functions.Can expand. The landmark event is the birth of the Ethereum smart contract.

I have explained many times that a smart contract is an automated contract signed by two or three parties. It will be automatically executed as long as the conditions are met. It is essentially a program with infinite possibilities and the judge in the blockchain world. Various functions can be input into the program, and the program exists. Blockchain has become rich and colorful.

Current blockchain applications mainly include the following aspects: smart contracts, payments, cross-chain assets, oracles, defi, web3 storage, etc. I will briefly mention two. Let’s take an example and talk about its commercial application.

For example, defi applications are quite popular on Ethereum now. Defi is decentralized finance. Abbreviation for decentralized finance.

What does it probably mean? It is to move all financial-related businesses in real life, such as mortgages, insurances, and loans, onto the blockchain.

This field is very popular now, and the reason is simple. It is very suitable for blockchain. As I said, a smart contract on the blockchain is a contract. If the contract conditions are met, execution can be automatically triggered.

In the past, it might have been very troublesome for you to go to the bank to apply for a loan. You had to sign various signatures and verify them, and the bank might not be open on weekends and nights

But with blockchain The network operates 24 hours a day. If you want to run various assets on it and do various mortgage transactions, you only need to click and there is a software terminal.

Of course, the real assets will be frozen in the process and mapped to virtual assets. After the transaction is completed, they will be exchanged for real assets. Cross-chain technology and oracle technology may also be used in this process, which I have written in detail in other articles.

It roughly means cutting off banks through decentralization, and direct point-to-point transactions. The security of transactions is guaranteed by blockchain technology, code and cryptography.

There is also the current web3 storage class. For example, the leading project fil. His vision is to take out all the scattered hard drives. Break all the data and information that need to be stored on the network into small pieces

and then distribute them to the entire network. When we want to use network data in the future, we no longer need large network database or server. In this way, Internet giants cannot charge high service fees. There is no way to maintain a monopoly.

If you want to obtain stored information, just take a taxi online like dd. You pay for a taxi, so that information on the Internet can flow freely. Costs will drop significantly.

Of course, these visions are grand and huge, and the current blockchain development is still in its early stages. There are still some technical difficulties to be overcome and some underlying systems to be established, but there is no problem in this direction.

Initial digital asset projects like Bitcoin have now been proven to be very safe. Just like this situation in Afghanistan, the first thing that comes to my mind is Bitcoin. He is the first violent and unplunderable asset.

Your house may be occupied and blown up, and your gold may be robbed. And if you have Bitcoin, it's much easier. He can't snatch this thing away, because the mnemonic phrase and private key are in your mind, and he doesn't even know whether you have this thing in your mind. If you want to pass it on to your child, just ask him to memorize the key and mnemonic phrase.

It is precisely because we are now in a stage of financing and bubbles that all the news you see on the Internet is still speculation.

Also, this thing is a back-end technology. For example, Guangdong Province already has blockchain invoices. For example, there are already some blockchain apps for judicial certification, but for the front-end For you, you can't feel it. There is an extra string of hash codes on the invoice, can you tell the difference?

This is why when it comes to blockchain now, everyone is speculating on coins, but in fact it has certain applications and future technical logic.

Third, it is essentially a mechanism of trust, a method of value transmission, and an exploration of social governance methods.

What is the essential value of blockchain? The most important thing is that it is a way of credit transfer. Because there is enough credit, real-life assets and property values ​​can be spread on the Internet in the form of information codes.

Mainly in these aspects.

First, before Bitcoin, people did not know how to protect a piece of information, because information on the Internet can actually be copied. Bitcoin solves the problem of uniqueness of information assets. With scarcity, there is value in transactions and storage.

The second is decentralization and disintermediation. We used to do everything. All require some kind of intermediary. For example, when you borrow money, a bank acts as an intermediary, and when you buy a house, various institutions and real estate agencies act as intermediaries.

You cannot buy or sell directly. Because you don't have enough credit. We usually come to find a third party, but the third party is usually made up of people and may also do evil.

For example, the master who could whip five lightning whips a while ago. If he calls you all kinds of names at the beginning, you may be frightened. You won't know he is a liar until he is punched and lying straight there. This is human credit, which is unreliable

Blockchain ensures credit through code, cryptography, and consensus mechanisms. We no longer need a powerful third party. Note that this third party will often become a monopoly boss.

The third is to reduce the cost of coordination, communication and entry barriers.

If we want to become richer, we needTrade in the market. And transactions require coordination and division of labor. Essentially, the companies and organizations we work for are intermediaries.

You have to integrate your resources through this kind of intermediary, transform your labor force, your brain power, and your ingenuity into final products and sell them on the market.

The smart contract technology of blockchain technology can break up these contracts in a decentralized manner. People in the market can combine freely to establish a new type of organization that is completely transparent and cannot tamper with the rules, which is a blockchain autonomous organization. The future of this kind of organization may be more promising than that of ordinary joint-stock companies.

You can join or quit an organization at will, and the trust between you and others has been resolved. You can cooperate with others and sign smart contracts to complete joint collaboration and complete a certain product. We no longer have to worry about some big capitalist taking advantage of everyone and getting the bulk of the profits.

So the Bitcoin blockchain is essentially a big social experiment, through the consensus mechanism, the decentralized decision-making method, and the distributed signing of smart contracts. Gradually and completely change the original appearance of our society. Restore the original ideal of market economy, peer-to-peer, direct transactions between people.

To summarize. Blockchain is a block of information connected together through an encryption algorithm. It is essentially an accounting method and a network data structure

Through decentralization, you can do finance, storage, and decentralize many things, but now it is still very In the initial stage, most projects are still in the stage of speculation, financing and concept development.

The value storage capability of the blockchain has been proven to be problem-free, very safe, and cannot be plundered by violence.

The essence of blockchain solves the problem of credit intermediary, and at the same time can reduce the cost for people to work together, lower the threshold for enterprise entry, improve social efficiency, make social transactions larger, and allow We are richer.

I recommend the book linked below, it is easy to understand. Like You Pump tells the history of the birth of blockchain, the underlying technical logic of blockchain, and some mainstream projects. Learn some knowledge about blockchain, feel more at ease, and no longer worry about whether it is a scam.

❹ Blockchain Era: Transformation from Information Internet to Value Internet

Guosen’s perspective

Guosen Overseas Group’s perspective:

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As the Internet has developed to the present, its main function is to allow information to circulate on the Internet, and information is spread by copying (A is copied to B). The "ledger" constructed by the blockchain is open, transparent, non-tamperable, peer-to-peer interconnected, and easy to trace, and builds an infrastructure based on a trust mechanism to allow the value of digital assets to circulate efficiently on the Internet.Value transfer occurs on the Internet (transferred from A to B, rather than copied from A to B). We are optimistic about the future of blockchain. However, the most important achievement of blockchain at this stage is the evangelism of ideas. Its emergence allows the market to see the shortcomings of the "Internet of Information" and the trend of the "Internet of Value".

Comments

The relationship between blockchain and Bitcoin

Explaining blockchain, there is no way around Bitcoin. The "invention" of Bitcoin has proven the feasibility of blockchain technology. Bitcoin is not the entirety of blockchain technology, but only one of its applications. Without Bitcoin, it’s possible that blockchain wouldn’t have happened, or at least not anytime soon.

The origin of the word "blockchain" is the "chain of blocks" in the original English version of the Bitcoin white paper. When translated into Chinese, the word "blockchain" is used. As the focus of Bitcoin mining shifts to China, the Chinese market has become the main battlefield for blockchain and Bitcoin. The English domestic market of blockchain is written as "blockchain", which has become a proper noun for the entire blockchain technology in the world. (Noun evolution path: chain of blocks - blockchain - blockchain).

The total amount of Bitcoin is limited, stimulating market speculation

Whether Bitcoin is regarded as a commodity or currency, due to its limited total amount, it stimulates market speculation on Bitcoin. Price, referred to as currency speculation. According to the Bitcoin generation mechanism, the total number of Bitcoins is 21 million.

Bitcoin is the reward after a new block is connected. A block is generated every 10 minutes. A certain number of Bitcoins are rewarded for each block generated. 50 are rewarded in the first four years. The number of Bitcoin rewards is halved every four years, so the total number of Bitcoins is 21 million. Calculation method: {50 X 6 X 24 X 365} X 4 X {1+1/2+. . . . . (1/2)n}=21 million (2.1*107).

Technical principles of blockchain

Blockchain timestamps all transactions through random hashing and merges them into an ever-extending random hash-based, working The proof-of-work chain is used as a transaction record. Unless all the proof-of-work is completed again, the transaction record cannot be changed. There are three steps to form a new block:

1. The miner packages the four parts of the "ledger, the header of the previous block, the timestamp, and the random number sequence X" within a period of time into a block;

2. Through a large number of calculations, the miner adjusts the random number sequence X of the block, generates the composite required hash value, and obtains Bitcoin rewards.

3. Miners connect the new block with the previous block to form a new blockchain.

The number of patents is an important indicator for quantifying blockchain companies at this stage

The global blockchain industry is still developing.In the early stages of development, most companies are in the conceptual design stage and have no commercialized products. It is difficult for outsiders to objectively evaluate the pros and cons of startups. We believe that the number of blockchain invention patents can reflect the potential of each company and is an important indicator for distinguishing blockchain companies through quantitative means at this stage.

Investment advice: Based on the fundamentals of the company, focus on the value of the Internet in the blockchain era

With the development of the Internet to the present, its main function is to allow information to circulate on the Internet, and information can be copied. propagation method (A is copied to B). The "ledger" constructed by the blockchain is open, transparent, non-tamperable, peer-to-peer interconnected, and easy to trace, and builds an infrastructure based on a trust mechanism to allow the value of digital assets to circulate efficiently on the Internet, and digital assets occur on the Internet. Transfer of value (transfer from A to B, rather than copying from A to B). We are optimistic about the future of blockchain. However, the most important achievement of blockchain at this stage is the evangelism of ideas. Its emergence allows the market to see the shortcomings of the "Internet of Information" and the trend of the "Internet of Value".

Realizing the "Internet of Value" requires large-scale application implementation, not a single technology. At this stage, blockchain is still in its early stages of development. We are optimistic about the future of blockchain, but we do not overestimate the present of blockchain.

In the Hong Kong stock market, there are many companies involved in blockchain. Based on the company's fundamentals and the number of blockchain patents, we recommend Tencent Holdings and Launch Technology, maintaining performance forecasts and recommendation ratings.

Tencent (0700.HK): We expect the company’s revenue growth rate from 2019 to 2020 to be 22% and 22%, and net profit growth rate to 23% and 16%, of which NON-GAAP profit growth rate is 15%, 16%. The EPS corresponding to 2019 and 2020 are HK$10.4 and 12.1, and the target valuation range is maintained at 380 to 400 yuan, corresponding to 31 times to 33 times PE in 2020. The overweight rating is maintained.

Launch Technology (2488.HK): We predict that the company’s revenue growth rate from 2019 to 2020 will be 9.7% and 12.2%, and its net profit growth rate will be 69% and 29%, corresponding to EPS of 0.32, 0.42 Hong Kong dollars. We maintain a "buy rating" and recommend a reasonable valuation of HK$8-9, corresponding to 25-28 times PE in 2019.

Risk warning

1. Blockchain concepts cannot be turned into products. 2. The emergence of new technologies causes the blockchain to be falsified. 3. The profits from the company’s existing business cannot support the long-term R&D investment in blockchain.

Appendix: Blockchain-related companies in Hong Kong stocks

1. Tencent (0700.HK): There is a dedicated blockchain portal (https://trustsql.qq). On October 19, 2019, Tencent released the "2019 Tencent Blockchain White Paper" to provide an overall introduction to Tencent's blockchain. schemes, including TrustSQL blockchain underlying platform and Tencent Cloud TBaaS, and four Tencent blockchain best practices were demonstrated in detail, including blockchain electronic invoices, micro enterprise chain, Zhixin chain and blockchain bank draft. Tencent, which focuses on "connection", continues to develop infrastructure construction in the field of blockchain and promotes the implementation of "blockchain+" industry solutions to promote value connections between enterprises and between enterprises and consumers. Through the "blockchain+" model, we empower the financial and real industries, promote the integration of blockchain and industry, and accelerate the construction of industrial blockchain.

2. China Mobile (0941.HK): On October 15, 2019, the Blockchain Service Network (BSN) press conference and event was hosted by the Information Center, hosted by China Mobile Communications Group Corporation and China UnionPay Co., Ltd., and co-organized by Beijing Hongzao Technology Co., Ltd. The Technology Development Summit Forum was successfully held in Beijing. China Mobile utilizes existing resources, cloud facilities and computing storage facility resources to conduct independent research and development and optimize existing facilities; as a new cornerstone, China Mobile promotes the mutual empowerment between 5G and blockchain.

3. Ping An of China (2318.HK): The number of global blockchain invention patent applications disclosed in 2018 was 84, ranking 7th in the world. Ping An relies on blockchain technology to improve the intelligent level of urban management. Ping An applies blockchain to medical health, targeted poverty alleviation, social welfare, etc.

5. ZhongAn Online (6060.HK): Anlian Cloud, a professional ecological cloud service platform based on artificial intelligence, blockchain and cryptography. The platform uses Zhongan Chain independently developed by Zhongan as its underlying infrastructure and also develops electronic signing , digital identity, distributed encrypted storage, certificate storage, traceability and other nearly 10 vertical applications.

6. Kingsoft (3888.HK): It was the first to implement Game + Blockchain applications and solutions. Currently, the game cloud business is exploring the application of blockchain technology and accelerating the expansion of the game ecosystem. In the first half of 2018, Kingsoft Cloud took the lead in launching the "project-X" plan for the entire ecosystem of blockchain games, realizing a project consisting of blockchain platform infrastructure construction, blockchain underlying technology, and blockchain game development, operation, and distribution. Complete blockchain game ecological structure.

7. HC Group (2280.HK): On January 31, 2018, HC Group announced that its first application scenario based on blockchain was officially launched. The cooperation framework agreement signed with Joyvio Technology will start from the agricultural field to build the HC Group District. Blockchain products use the advantages of industrial big data and blockchain application scenarios to expand the modern agricultural blockchain market.

8. Launch Technology (2488.HK): The company is China's earliest leading high-tech enterprise dedicated to the research and development and production of automobile diagnosis, testing, maintenance, and tire equipment. As a leader in the Internet of Vehicles industry, the company is deeply involved in exploring solutions for the integration and monetization of automotive big data. In 2018, the company ranked among the number of blockchain-related patent applicationsRanked fifth in the world, it stands at the forefront of new blockchain technologies. The company has combined blockchain technology with industry applications and developed a series of products called the "Super Car Chain Project", tailor-made for the Internet of Vehicles industry. 4G vehicle data collection terminal with blockchain technology – GTBOX-I. Launch Technology has publicly stated its position many times: No matter whether it is declining or rising, it refuses to get involved in digital currencies and ICOs. It neither public nor private placements, and concentrates on exploring the value of the chain.

9. Meitu Company (1357.HK): The vision of Meitu Blockchain is to connect the digital world and reality by creating a decentralized, secure and encrypted identity pass for users: Meitu Intelligent Passport (MIP - Meitu Intelligent Passport) world and create a trusted blockchain environment. On the one hand, Meitu Intelligent Pass (MIP) allows users to anchor assets scattered across various applications on the blockchain, and through face recognition AI verification, use various applications more conveniently and securely, and receive privacy protection; On the other hand, Meitu Intelligent Pass (MIP) also allows some services that require strong verification, such as the medical and education fields, to more effectively use blockchain to serve users.

10. Gome Retail (0493.HK): On April 14, 2018, according to Gome Retail, Gome has entered the era of comprehensive digitalization. Operating digital stores is Gome’s “No. 1 Project”, and the company’s focus on blockchain technology and decentralization Technology is always doing research. The relevant person in charge of Gome Retail said: Gome’s shared retail business model and employee beauty store retail strategy are very consistent with the decentralized model system of the blockchain. The employee beauty store is also a new channel that Gome hopes to build.

(Source of article: Guosen Securities)

Solemn statement: The purpose of releasing this information is to spread more information and has nothing to do with the position of this site.

❺ Does blockchain really have development prospects?

Blockchain undoubtedly has development prospects, and the necessary condition for development prospects is to enter the mainstream market.

Matt Spoke, founder and CEO of North American blockchain infrastructure The OAN (formerly Aion Network), published an article in Forbes on July 24 titled "In order to successfully enter the mainstream market, blockchain projects must "Eat Dog Food", in which Matt mentioned his views on how blockchain should enter the mainstream market - "Eat Dog Food".

In the technology circle, there is a jargon called "dogfooding" (also known as eating your own dog food), which refers to a company using its own products and becoming a user of its own products. Many high-growth companies (such as Microsoft, Facebook, Amazon, Apple, Netflix and Google) also use dog food to test products or help build credibility for their products. "Although "eating dog food" is often used to find and fix bugs, it has another value: creating reliable use cases for the company's products.

This is worth learning for blockchain projects, because it is Blockchain projects often hold the idea of ​​"build it and they (users) will come naturally" and habitually hand over the responsibility of creating fresh and interesting blockchain applications to third parties.

This This attitude is so common that even the well-known blockchain summit Consensus 2019 (2019 Consensus Conference) also held a roundtable forum titled "Build it, and they (users) will naturally come: Creating a global blockchain center". Discuss how governments around the world can make efforts to attract blockchain projects while balancing the needs of regulation, investment and innovation.

To be fair, this strategy is not suitable for blockchains that only target cryptocurrency circles. may be valid. For security tokens, especially exchanges that trade such representatives, it makes even more sense - "supply creates demand" is the usual thinking here, especially considering the implementation of these Transactions require building complex infrastructure.

In contrast, "eating dog food" is more likely to be used by those seeking mainstream audiences (such as those in the financial industry, manufacturing and supply chain, identity management, etc.) used by blockchain project developers. If blockchain technology wants to break into these mainstream fields, blockchain companies must first "eat dog food." This will not only clearly prove that blockchain technology is also popular outside the currency circle. Feasible, it can also highlight that blockchain can not only optimize existing use cases, but also create new use cases.

The OAN team has always adhered to this concept and relied on The OAN built over the years. and Aion’s technology stack, developed Moves, a financial technology platform for independent workers.

Matt said that when developing and developing the Moves product, the team hopes to have related functions of The OAN blockchain network can be fully utilized, so the focus will be on the following three aspects:

1. How to use The OAN blockchain network to improve the credit efficiency of products.

Improve credit There are two main considerations for efficiency: 1) Whether Zheng Lu can learn from the mechanisms of the DeFi market to reduce capital costs; 2) whether blockchain technology can be used to increase the outside world's trust in Moves' credit process. Here, Moves will form A "pooling of wisdom" mechanism that allows everyone to contribute to reducing credit risk and increasing the credibility of the credit granting process, and may even develop a micro-guarantee mechanism in the future. Users will therefore be able to act as borrowers , lenders or guarantors to participate in the market established by the platform.

2. How to align the interests of products and users.

Specifically, by integrating Moves with The OAN The network is connected, and with the help of the digital asset Aion, a relationship of consistent interests is formed between the product and the user, so that the user can personallyExperience the success of Moves product development, and at the same time, you can directly participate in the blockchain network that supports Moves - The OAN.

3. How to create a pioneering financial reputation data open system with Moves.

This open system may become a replacement for traditional credit scores or related mechanisms. For years, banks and financial institutions have used scores from Equifax, FICO or others as risk indicators, and the Moves team believes that the product it is building will be a good start - a better, more modern financial system. The beginning of the reputation system. This is a long-term goal.

Moves supports mainstream ride-sharing, food delivery and other gig economy concept platforms in North America and will be the flagship open application developed by The OAN on its blockchain network. In June, Moves' business operations expanded from Ontario to two more provinces - Alberta and British Columbia, and into Western Canada.

The various measures taken by The OAN team are all based on the spirit of "eating dog food" and working hard to allow blockchain technology to enter the mainstream market as soon as possible. Blockchain is not for the niche, but for the mainstream. In addition to The OAN team, many projects and institutions in the blockchain industry are also moving towards this goal. With such an excellent and targeted blockchain, what can you do? Are you saying there is no development prospect?

❻ What does a higher block height mean?

Block height refers to the height of a block between it and the genesis block in the blockchain. number of blocks between. Block height is another way that a block can be identified by its position in the blockchain. The first block has a height of 0. Each subsequent block stored above the first block is one position "higher" in the blockchain than the previous block, just like boxes one after another. One stacked on top of other boxes.

Unlike the block header hash value, the block height is not a unique identifier. During the growth of the blockchain, two or more blocks may have the same height. , this situation is called "blockchain fork".

Blockchain is translated from blockchain. When people see "chain", they think of a long chain, which has the concept of length. But in the blockchain, it is not called the block length, but the block height. You can understand the blockchain as a block stack.

The genesis block, the 0th block, is located at the bottom, and each block is stacked on top of the previous block, so that it is easier to understand the block height. When we query a certain block information, in addition to its hash, we can also query it through its block height.

The role of block height
Block height is the identifier of the block. The block has two identifiers, one is the hash value of the block header, and the other is the block height. The hash value of the block header is a secondary hash calculation of the block header using the SHA256 algorithm.And get the number. The block hash value uniquely and unambiguously "identifies" a block, and any node can independently obtain the block hash value by simply hashing the block header. Block height refers to the position of the block in the blockchain. Block height is not the only "identifier". While a single block will always have a clear, fixed block height, the converse is not true and a block height does not always identify a single block. Two or more blocks may have the same block height and compete for the same position in the blockchain.

❼ What are the opportunities and challenges in the innovative development of blockchain that we must seize?

In this new era of the 20th century, there are many opportunities that we need to seize, not only It is important for us as individuals and for our country to seize opportunities. The new century is a new opportunity and challenge for the whole world. New technology and economy have many impacts on all aspects of our lives. And the latest "digital economic development," has laid an important foundation for the development of today's era. So what is the development and innovation of blockchain?

The whole world is innovating and developing, and we need to see the right time to seize the opportunity. Opportunities are reserved for those who are prepared.

❽ It’s 2021, what will be the development trend of my country’s blockchain technology in the future?

Domestic blockchain technology has been conceptualized a few years ago and has now become widely used It has been applied to actual business scenarios, such as the rice we eat, and the QR code on the packaging
Traceability is the application of blockchain technology. Companies like Shanghai Wanglian Technology entered the market earlier and are currently developing very well.

❾ The future development prospects of blockchain

1. Blockchain has become the forefront of global technological development and opened up a new track for international competition. Blockchain will become a new key infrastructure to further accelerate the development of the digital economy, lead a new round of global technological change and industrial change, and become the "source" of technological innovation and model innovation. The world's major developed countries will further pay attention to blockchain technology, intensively introduce relevant policy plans, increase industrial support and guidance, and enhance the competitiveness of their country's blockchain technology and industry.
2. The digital currency bubble gradually cools down. With the spread and popularization of the concept of blockchain technology, more and more people will realize that Bitcoin is not the same as blockchain, and various air coins will be gradually eliminated. Blockchain technology innovation will return to a more rational track. Technical features such as decentralization, multi-party collaboration, and anti-calculation tampering will be highly valued by relevant industries. Some industries with strong innovation capabilities will continue to emerge with blockchain applications that have been transformed based on industry characteristics.