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① What is blockchain technology and what aspects may it be used for in the future?

Blockchain is a distributed shared accounting technology. What it wants to do is to allow All parties involved are able to build a trusting relationship at the technical level. Blockchain can be roughly divided into two levels: one is the underlying technology of the blockchain; the other is the upper-layer application of the blockchain, that is, the transformation, optimization or innovative application based on the blockchain.
Blockchain has been applied in several fields. In the first field of digital assets, in addition to some points and check-in cards we have seen, it also includes various other assets, and there is a process of asset digitization.
The second area is the field of trade finance. Because the field of trade finance is originally a multi-link and multi-party participation method, blockchain can greatly improve the efficiency of the middle, making many of the original substitutes effective.
The third area uses equity, which is a company's equity like some regional equity trading centers. The purpose is to facilitate equity-to-transactions and facilitate relative circulation. At present, the multi-center blockchain system can indeed improve efficiency and reduce costs.
Xinlian is an information platform for news and data mining that is vertical in the field of blockchain. We hope it will be helpful to you.

② What is blockchain technology? What impact may blockchain technology have on our lives?

Blockchain technology has not yet had a major impact on our lives, but in the future The impact is estimated to be huge

③ Is 2022 a good time to buy a house? Do you have plans to buy a house?

First of all, it is impossible to say what will happen to China's housing prices in the future.

Overall, in the next 2-5 years, the first and second tiers will fall by 15%, and the third and fourth tiers will drop by 30%. It is a high probability event. The first and second tiers have low holding costs, while the third and fourth tiers have limited purchasing power.

Nowadays, the leverage of residents is too high, and it is difficult for the government to increase wages even if the government releases funds. Basically, it is transferred to Leeks in the form of leveraged credit. The current situation is really unbearable. In the past few years, almost everyone who has enough basic money to make a down payment has bought a car. It is really dangerous to double the down payment.

Do the third and fourth tiers want to sell land? Of course they do. Is there a shortage of land? There is certainly no shortage. The new areas are all filled with land. The key is that this liability is not transferred to home buyers, and the government's land sales money is the bank's money. Again, there are too many stocks and I really can’t pick up the leeks. Recently, there have been more and more failed land auctions, and it is urgent to supplement finance with property taxes.

The essence of the first and second lines is the same, but the situation is slightly better, because the belief and holding cost are too low, and the two sides are still in a stalemate. Shenzhen and Shanghai restricted loan quotas, transaction volume dropped instantly, and the so-called big guys who bought the houses they just needed with full payment disappeared.

The introduction of the property tax has completely changed this equilibrium state. The guide price is obviously prepared for the property tax. Otherwise, who else would be so tired to give a guide price to each community. If the real estate tax pilot is implemented quickly, it will be by the end of the year. If it is delayed, it will be next year. It will definitely be launched. It will not be as popular as everyone thinks.So cruel, not like Shanghai and Chongqing before. Sell ​​the land when it is time to do so without delaying property taxes. After all, there will be a transition time, and the ratio between the two will be dynamically adjusted. At the same time, state-owned developers began to develop public rental housing. The country has many options for building public rental housing: a large number of vacant office buildings in the city center have been renovated, have good locations, and are endorsed by the state. It just depends on whether the country is willing or not. As the holding cost goes up, first-line housing prices will definitely loosen, but after all, if the first-line housing prices decline for a few years, a 15% drop is acceptable, and it will just go back to around 2019. So I personally feel that the first and second tiers will be an excellent low point to get started in 2-3 years.

It is estimated that it will take 2-3 years before the third and fourth tiers are fully levied, but if we have expectations, we will not be afraid of rising prices. The bubble in the third and fourth tiers is still quite serious. A 30% drop is considered good, but it may be cut in half directly.

This time we look at the determination and means to deal with double reductions. It feels really different.

Finally, no matter whether you buy it or not, just pay attention to the leverage. Yesterday I saw a post about buying a house in Chengdu, draining the down payment of both parents and borrowing foreign debt. It's so dangerous. Many people born in the 1990s have not realized that their parents' bodies are getting weaker day by day, and people will get sick as they get older. Being sick costs a lot of energy and money.

④ Advantages of Blockchain Technology Classification of Blockchain Technology

The development of Blockchain technology is becoming more and more prosperous with the continuous expansion of applications. This kind of technology comes from various The strong development momentum of industry demand has brought about rapid changes in blockchain technology, which has attracted more and more attention to the achievements of various industries. From professional technology to resources, they are constantly concentrated in this industry, thus making blockchain technology more and more popular. The development of blockchain technology has entered a new stage, and the impact brought by the development of this blockchain technology has also attracted much attention.

When talking about blockchain technology, Bitcoin has to be mentioned. Many people know that the electronic currency Bitcoin does not rely on the issuance of a specific monetary institution, but is generated through a large number of calculations by a specific algorithm. In fact, the core that truly supports Bitcoin is blockchain technology.

How does the invisible and intangible Bitcoin operate through blockchain technology? The interpretation circulated in the industry is that blockchain can be regarded as a technical solution for collectively maintaining reliable databases through "decentralization" and "trustlessness". In layman's terms, this technology can be understood as a technology in which everyone participates in accounting. In the past, people used centralized servers to keep accounts, but in the blockchain technology system, everyone can participate in accounting and jointly identify Authenticity of records.

“Through this technology, even if there is no neutral third-party organization, two parties that do not trust each other can achieve cooperation. In short, the blockchain is like a ‘machine that creates trust’. "Bubi Company is a leading blockchain service provider in China. It has made many breakthroughs in the blockchain technology platform, can meet scenarios with tens of millions of users, and has the ability to quickly build upper-layer application businesses.

The blockchain technology where all parties participate in recording and storing information adopts decentralized analysis.The distributed structure saves a lot of intermediary costs and can better ensure data security; at the same time, it has an untamperable timestamp, which can effectively solve problems such as data tracking and information anti-counterfeiting.

Will it become the next trend of Internet finance?

Although blockchain emerged with Bitcoin, the derived value of this technology has transcended digital currency. Bubi Blockchain focuses on the innovation of blockchain technology and products. It already possesses a number of core technologies and has developed its own blockchain service platform. With decentralized trust as the core, we are committed to building an open value circulation network to allow digital assets to flow freely. What Bubi wants to do is to create a new technology and product - to realize real value circulation and bring the Internet to a new level. With the application of this technology, there will be no central organization when transferring assets, and direct transfer of assets between us can be achieved.

In the current international financial market, the U.S. Central Bank, Swiss Bank, and some insurance and futures companies are all competing to develop blockchain technology. Fang Liang introduced that in the Internet financial industry, blockchain technology will first affect financial infrastructure such as payment systems, securities settlement systems, and transaction databases; later, the technology will also expand to general financial services, such as credit systems and "anti-money laundering" "wait.

“The payment and clearing system in the financial field will evolve towards decentralization. The electronic ledger supported by blockchain technology is a reliable system that is error-free and cannot be tampered with. Quan and others have a profound impact." Li Yan said.

Therefore, industry insiders believe that blockchain technology may be the next trend in the Internet financial industry. As the interconnection of all things deepens, Yang Tao, assistant director of the Institute of Finance, Chinese Academy of Social Sciences, also said that blockchain will make it possible for all individuals to become important nodes in the allocation of financial resources, and will also promote the improvement of existing financial system rules. Build a shared and win-win financial development ecosystem.

Blockchain technology will affect many industries

“Blockchain technology has been widely used in the era of big data.” Li Yan said frankly that in addition to the Internet financial field, Blockchain technology has been applied in many fields and has shown great prospects.

For example, the healthcare industry has benefited greatly from blockchain technology. In reality, patient private information leaks often occur, and centralized database or file cabinet management in medical departments is no longer the optimal choice. Medical institutions are using blockchain technology to keep patients' private information confidential.

In addition, blockchain technology also has important legal implications. In some civil fields, it is often necessary to provide evidence to determine blame, and blockchain technology can record every step and help judicial authorities identify the specific responsible person.

“Especially in the field of assets, whether it is real estate, cars and other physical assets, or health, reputation, etc.Intangible assets can be registered, traded, and tracked using this technology. It can be said that blockchain technology will be useful in any area of ​​production and life that lacks trust. ”

The development of blockchain technology has also brought about changes in the operational concepts of various industries. New technologies and new concepts have promoted new developments in various industries. The impact of this driving force on society is The promotion of economic activities is also huge. Many new industry phenomena will occur one after another, and the public is also waiting and watching, looking forward to this new technology being used by various industries and better benefiting various industries.

⑤ District Applications of Blockchain

The main application scope of Blockchain includes: digital currency, transaction settlement of financial assets, digital government affairs, certificate deposit and anti-counterfeiting data services and other fields. Blockchain is a block chain of data. Sequential link, each block is responsible for recording a file data and encrypting it to ensure that the data cannot be modified or forged.

Blockchain is essentially a multi-party database that applies cryptography technology. A distributed database system that participates in, jointly maintains, and continues to grow is also called a distributed shared ledger. Each page in the shared ledger is a block, and each block is filled with transaction records. Blockchain technology eliminates the anonymity and Characteristics such as centralization, openness, transparency, and non-tampering make it popular among enterprises and has been widely used.

Blockchain application scope 1. Financial field

Blockchain can provide a trust mechanism, It has the potential to change the financial infrastructure. Various financial assets such as equity, bonds, bills, warehouse receipts, fund shares, etc. can be integrated into the blockchain technology system and become digital assets on the chain. Storage, transfer and transaction.

The decentralization of blockchain technology can reduce transaction costs and make financial transactions more convenient, intuitive and secure. The combination of blockchain technology and the financial industry will inevitably create More and more business models, service scenarios, business processes and financial products are being developed, thus bringing more impact to the development of financial markets, financial institutions, financial services and financial formats. With the improvement of blockchain technology and the Combining technology with other financial technologies, blockchain technology will gradually adapt to the application of large-scale financial scenarios.

2. Public service field

Traditional public services rely on limited data dimensions, and the information obtained may not be enough. Comprehensive and with a certain lag. The non-tamperable nature of the blockchain makes the digital certification on the chain highly credible. It can be used to establish new certification mechanisms in the fields of property rights, notarization and public welfare, and improve the quality of public services. Management level.

Relevant information in the public welfare process, such as donation projects, fundraising details, fund flows, recipient feedback, etc., can be stored on the blockchain to meet the privacy protection and other requirements of project participants. Under the premise of relevant laws and regulations, conditional public disclosure is made to facilitate public and social supervision.

3. Information security field

Using the traceability and non-tampering characteristics of blockchain, the source of data can be ensured. Authenticity while ensuring data integrityForgery, blockchain technology will fundamentally change the security issues of information transmission paths.

Blockchain is reflected in the following three points in the field of information security:

User identity authentication protects data integrity and effectively prevents DDoS attacks

The distributed storage architecture of blockchain will make Hackers are at a loss as to what to do. Some companies have begun to develop a distributed Internet domain name system based on blockchain to eliminate the root cause of the current DNS registration shortcomings and make the network system cleaner and more transparent.

4. Internet of Things field

Blockchain + Internet of Things can allow each device on the Internet of Things to operate independently, and the information generated by the entire network can be protected through smart contracts in the blockchain.

Security: Traditional IoT devices are highly vulnerable to attacks, data loss and maintenance costs are high. Typical information security risk issues for IoT devices include low firmware versions, lack of security patches, permission loopholes, too many device network ports, and unencrypted information transmission. The blockchain's consensus mechanism for network-wide node verification, asymmetric encryption technology and distributed data storage will significantly reduce the risk of hacker attacks.

Trustability: The traditional Internet of Things is managed and controlled by a centralized cloud server. Due to the security of the device and the opacity of the centralized server, it is difficult to effectively protect user privacy data. The blockchain is a distributed account book. Each block is interconnected and has its own independent working ability, ensuring that the information on the chain will not be tampered with at will. Distributed ledgers can therefore provide trust, ownership records, transparency and communication support for the Internet of Things.

Effectiveness: Limited by cloud services and maintenance costs, the Internet of Things is difficult to achieve large-scale commercial use. The traditional Internet of Things realizes communication between things through centralized cloud servers. The disadvantage of this model is that as the number of access devices increases, the server faces more load, requiring enterprises to invest a lot of money to maintain the normal operation of the IoT system.

Blockchain technology can directly realize point-to-point transactions, omitting the labor expenditure of other intermediaries or personnel, which can effectively reduce the costs incurred by third-party services and maximize benefits.

5. Supply chain field

The supply chain consists of many participating entities, with a large amount of interaction and collaboration. Information is discretely stored in their own systems, lacking transparency. The lack of smooth information makes it difficult for various participating entities to accurately understand the real-time status and existing problems of related matters, affecting the collaborative efficiency of the supply chain. When disputes arise between parties, it is time-consuming and laborious to provide evidence and pursue accountability.

Blockchain can make data open and transparent among various entities, thereby forming a complete, smooth, and non-tamperable information flow throughout the entire supply chain. This can ensure that all entities promptly discover problems arising during the operation of the supply chain system and find targeted solutions, thus improving the overall efficiency of supply chain management.

6. Automotive Industry

Last year it was announced that the partnership would use blockchain to build a proof of concept to streamline the car rental process and build it into a “click, sign up, and drive” process. Not yetIncoming customers select the car they want to rent and enter it into the blockchain's public ledger; then, sitting in the driver's seat, the customer signs the rental agreement and insurance policy, while the blockchain updates the information simultaneously. It’s not just imagination, this type of process could become a reality for car sales and car registrations as well.

7. Stock Trading

For many years, many companies have worked to make the process of buying, selling, and trading stocks easier. Emerging blockchain startups believe that blockchain technology can make this process more secure and automated than any previous solution. At the same time, blockchain startup Chain is working with Nasdaq to achieve this through blockchain. Equity transfer of private companies

8. Government management

Government information, project bidding and other information are open and transparent. Government work is usually subject to public attention and supervision, because blockchain technology can ensure the transparency and immutability of information. , which plays a great role in the implementation of transparent government management. There is a certain degree of information opacity in government project bidding, and companies also have the risk of information leakage during the sealed bidding process. Blockchain can ensure that bidding information cannot be tampered with, and can ensure the transparency of information, forming a shared trust among competitors who do not trust each other. And it can arrange subsequent smart contracts through the blockchain to ensure the construction progress of the project and prevent the growth of corruption to a certain extent.

There are many more applications of blockchain technology, and this is just a fulcrum of blockchain applications. In the future, blockchain technology will be applied everywhere

⑥ How to understand blockchain and blockchain technology

Blockchain technology uses mathematical methods to achieve distribution decentralized accounting and solve the trust problem, which will have a profound impact in many fields such as communications, finance, Internet of Things, and government management.
Blockchain refers to a technical solution that collectively maintains a reliable database through decentralization and trustlessness. It is a technical method for all people to participate in accounting. The previous accounting methods were centralized and required a centralized intermediary, whether the intermediary was a traditional government, financial institution, notary agency or an emerging e-commerce platform or online payment platform.
In economics, information is sufficient. In fact, very large intermediaries exist precisely because of insufficient information. The existence of intermediaries increases transaction costs and raises transaction thresholds. Blockchain technology is essentially a large-scale collaboration tool. It uses pure technology to make direct value transfer possible for the first time, and continues the trend of decentralization and disintermediation of the Internet. Disintermediary blockchain technology will greatly subvert the information intermediary industry.
Blockchain technology is the basic technology for constructing the Bitcoin data structure and encrypted transmission of transaction information. This technology realizes the issuance and transaction of Bitcoin. The core of blockchain technology is that all currently participating nodes jointly maintain transactions and databases, making transactions based on cryptographic principles rather than trust, so that any two parties who reach an agreement,Payment transactions can be performed directly without the involvement of a third party.
Technically speaking, a block is a data structure that records transactions, reflecting the flow of funds in a transaction. The blocks that have reached transactions in the system are connected together to form a main chain, and all nodes participating in the calculation record the main chain or part of the main chain.
A block contains the following three parts: transaction information, hash hash formed by the previous block and random number. Transaction information is the task data carried by the block, specifically including the private keys of both parties to the transaction, the number of transactions, the digital signature of electronic currency, etc.; the hash formed by the previous block is used to connect the blocks to realize the past The order of transactions; random numbers are the core of transaction completion. All nodes compete to calculate the answer to the random number. The node that gets the answer the fastest generates a new block and broadcasts it to all nodes for update, thus completing a transaction.

⑦ The significance of blockchain technology and the principles of blockchain technology

To fully understand the principles of blockchain, we must systematically understand it from its birth and development, so as to To more clearly identify the principles of blockchain from multiple angles. Blockchain technology refers to a technical solution that collectively maintains a reliable database in a decentralized manner. This technical solution mainly associates blocks through cryptographic methods. Each data block contains all data information of the system within a certain period of time, and a digital signature is generated to verify the validity of the information and link to the next data block. Form a main chain (Chain).

A block is a record in the blockchain that contains and confirms pending transactions.

Mining refers to the formation of new blocks through calculation. It is a process in which supporters of transactions use their own computer hardware to perform mathematical calculations for the network to confirm transactions and improve security. Take Bitcoin as an example: Transaction supporters (miners) run Bitcoin software on their computers and continuously calculate complex cryptographic problems provided by the software to ensure that transactions proceed. As a reward for their services, miners receive fees included in the transactions they confirm, as well as newly created Bitcoins.

Peer-to-Peer Network refers to a system that allows a single node to interact directly with other nodes, thereby enabling the entire system to operate like an organized collective. Take Bitcoin for example: the network is built in such a way that every user broadcasts the transactions of other users. And importantly, no bank or other financial institution is required as a third party.

Hash is a classic technology in cryptography, which converts input of any length into a fixed-length output composed of letters and numbers through a hashing algorithm.

Digital Signature is a mathematical mechanism that allows people to prove ownership.

Private Key is a confidential data block that proves you have the right to spend electronic money from a specific wallet. It is implemented through a digital signature.

Double spending refers to users trying to illegally pay electronic money to two different payees at the same time, which is one of the biggest risks of electronic money.

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The origin of blockchain: an underlying technology that supports the operation of Bitcoin

The concept of blockchain was first proposed by Proposed by Satoshi Nakamoto in his paper "Bitcoin: A Peer-to-Peer Electronic Cash System" published in the Bitcoin Forum. In the paper, blockchain technology is the basic technology for constructing Bitcoin data structure and encrypted transmission of transaction information. This technology realizes Bitcoin mining and transactions. Satoshi Nakamoto believes: First, the model of using third-party organizations to process information has an inherent weakness of lack of trust between points. In order to be wary of their customers, merchants will ask customers for completely unnecessary information, but they still cannot Avoid certain fraudulent behaviors; secondly, the existence of intermediaries increases transaction costs and limits the practical minimum transaction size; thirdly, digital signature itself can solve the electronic currency identity problem. If third-party support is needed to prevent double consumption, the system will lose value. Based on the above three existing problems, Satoshi Nakamoto created Bitcoin based on blockchain technology.

On January 3, 2009, Satoshi Nakamoto created the first block in the Bitcoin world, the "Genesis Block" and mined the first batch of 50 Bitcoins.

On May 21, 2010, a Florida programmer used 10,000 Bitcoins to purchase a $25 pizza coupon. With this transaction, the first fair exchange rate for Bitcoin was born.

In July 2010, the first Bitcoin platform was established, new users increased dramatically, and prices soared.

In February 2011, the price of Bitcoin reached $1 for the first time, and since then exchange trading platforms with British Pound, Brazilian Real, and Polish Zloty were opened.

In 2012, Ripple was released as a digital currency that uses blockchain to transfer foreign exchange between countries.

In 2013, Bitcoin skyrocketed. The U.S. Department of the Treasury issued regulations on the personal management of virtual currencies, clarifying the definition of virtual currencies for the first time.

In 2014, the mining machine industry chain represented by China became increasingly mature. In the same year, the U.S. IT community recognized the cross-era innovative significance of blockchain in the digital field.

In 2015, the US Nasdaq Stock Exchange launched Linq, a digital ledger technology based on blockchain, to record transactions and issuance of stocks.

The principles of blockchain can be understood clearly from each application case. The application of blockchain principles is becoming more and more popular. Recently, Citigroup, Japan's Mitsubishi UFJ Financial Group, UBS and Deutsche Bank The world's largest financial institutions, such as China Banking Corporation, will also apply "blockchain" technology to create a fast, convenient and low-cost transaction operating system. In addition to the financial field, blockchain technology has also begun to be used in fields such as the protection of intellectual property rights, lawyer notarization, and online games that require transparent disclosure and permanent records of information.

⑧ What are the technical principles of blockchain

The key points involved in blockchain technology include: decentralization, trustless, collective Maintenance (Collectivelymaintain), reliable database (ReliableDatabase), timestamp (Timestamp), asymmetric encryption (AsymmetricCryptography), etc.

Blockchain technology redefines the way credit is generated in the network: In the system, participants do not need to know the background information of other people, nor do they need to rely on guarantees or guarantees from third-party institutions. Blockchain Technology ensures that the system records, transmits, and stores value transfer activities, and the final result must be credible.

(8) Technology transfer business and blockchain extended reading

The source of the principles of blockchain technology can be summarized as a mathematical problem: the Byzantine Generals Problem . The Byzantine Generals Problem extends to Internet life, and its connotation can be summarized as: in the context of the Internet, when it is necessary to conduct value exchange activities with unfamiliar counterparties, how can people prevent themselves from being deceived by malicious saboteurs? Be confused and make wrong decisions.

Further extending the Byzantine Generals Problem into the technical field, its connotation can be summarized as: in the absence of a trustworthy central node and a trustworthy channel, the problems distributed in the network How should each node reach consensus. Blockchain technology solves the long-known Byzantine Generals Problem by providing a way to create a consensus network without trusting individual nodes.

⑨ What are the application examples of blockchain technology

The express logistics industry is an industry that is very suitable for the application of blockchain technology.

In fact, the logistics ecosystem is relatively complex and there are many groups involved in the process.

The industry itself is a complex of segments with the concept of "flow". Starting from the initial "business flow", it gradually gave birth to "logistics", as well as the corresponding support of "capital flow" and "information flow" , complete the service chain.

There is a key issue behind the emergence of various "flows", which is the transfer of commodity ownership.

Coincidentally, many of the types of problems solved by blockchain technology are related to the trust friction generated during the transfer of asset ownership.

ShouldThe use of blockchain technology can significantly improve the processing speed and efficiency of settlement business in the express logistics industry, effectively solve the problem of traceability and anti-counterfeiting of items, and fully ensure information security and the privacy of senders and recipients.

In the field of promoting application in the express logistics industry, there are domestic blockchain companies doing applications in this area, such as Walton Chain.

Last year, Waltonchain reached a strategic cooperation with Huodou (Xiamen) Technology Co., Ltd., using Waltonchain’s “RFID blockchain” technology solution to help it improve its logistics solutions and move goods to Dou puts data on the chain in all aspects of its logistics turnover, such as entering and exiting the warehouse, receiving goods and other key nodes. After deploying the reading and writing system, when the object passes through any link, the relevant data can be read by the RFID reader and writer, and the relevant data can be read by the RFID reader. Corresponding behaviors are converted into data and uploaded to the blockchain. Users can trace the entire logistics process with one click.

Four business scenarios that can be implemented in the real environment are suitable for the application of blockchain technology.

Scenario 1: Insured express delivery

Revolving around the insured scenario, express companies transport goods, insurance companies provide guaranteed goods, merchants provide goods sales, sellers purchase insured services, and the government regulates the industry.

So, what should be recorded on the blockchain? There are several key points. The logistics details of the goods, accounts, identities, claims, other reference data and other information are recorded on the blockchain.

Insured price is the concept of a contract. When the customer signs for the package normally, the account claim is automatically triggered, the contract ends normally, and the premium is automatically cleared. If there is a problem or missing piece, the insurance company's claim process will be triggered.

Scenario 2: Charity express delivery

For charity activities, such as the "One Cent" campaign, one cent from the cost of each charity package is donated to the account of the charity organization . In this scenario, the express delivery company is still responsible for the transportation of goods, the public welfare organization provides the execution of public welfare activities, and the poverty alleviation merchants provide the sales of public welfare and poverty alleviation products.

Then what is recorded in the blockchain is the logistics details of the goods. After the package is signed for, it will be recorded on the blockchain, automatically triggering the transfer from the logistics company's public welfare account to the public welfare organization's account. When the public welfare activities are completed, the entire process is open and transparent, which avoids the public's distrust of social welfare activities.

Scenario 3: Industry blacklist sharing

At present, the blacklist of express delivery employees is still mainly offline. We hope that through blockchain technology, each company can record the blacklist of employees on the blockchain, and other companies can also query it, and the data cannot be modified, and can be traced back to which company this person worked in What kind of inappropriate behavior and other information.

Scenario 4: Supervision of safety incidents in postal delivery channels

Many express companies will install security inspection machines, and the government also wants to know whether each logistics company has any transportation safety hazards. Through the distributed accounting model, each express delivery company can record the details of the security incident when a security incident occurs.Valid information is recorded on the blockchain, allowing regulatory agencies to monitor it in real time and cannot be tampered with.