区块链几点刷新一次,区块链几点刷新时间

⑴ What time does Binance reset to zero every day?

Binance will not reset to zero, it will just update.
Binance counts a new day at 8 a.m. Beijing time, which is Binance’s default daily opening time. Cryptocurrency is global and does not respect national boundaries. Some platforms use UTC as the starting point for opening, which is 8 a.m. Beijing time. The price increases and decreases shown on Binance are compared to those 24 hours ago. Because there is no opening time and closing time for cryptocurrency trading, cryptocurrency is continuously traded 24 hours * 366 days.
Extended information:
1. Introduction to Binance Coin:
BNB-Binance Coin is a decentralized blockchain digital asset based on Ethereum. As the platform currency of Binance Exchange, I believe most investors still have certain recognition of its market trends and the rise of the exchange.
BNB, as the fuel of the Binance ecosystem and decentralized exchange, has been applied in many scenarios. For example, using BNB to deduct binance transaction fees can get up to 50% discount, which can be used in Monaco Visa and APP applications. BNB payment, you can use BNB to purchase virtual gifts, etc. on the Uplive live broadcast platform. Currently, BNB ranks firmly among the top 20 in the world, and its best ranking is among the top 10 in the world. It is supported by blockchain enthusiasts in more than 180 countries and regions around the world.
Based on the development situation of the entire market exchange, Binance Exchange is also recognized as the top brother. It has risen in just two years, surpassing many second- and third-tier exchanges, and its users have rapidly spread to many countries and regions around the world. . The current price of BNB is 140, which is a correction compared to the previous price of 180. In terms of long-term value, BNB is still worth investing in.
2. Does Binance trade 24 hours a day?
Binance trades 24 hours a day. Digital currencies are different from stocks. Digital currencies are all traded 24 hours a day. Digital currencies do not have any trading restrictions, 7*24 hours trading, and there are no price limits. This is pushing transactions to the extreme. The liquidity of digital currency is stronger than any asset and can be realized through transactions at any time. This is far beyond the reach of traditional investment assets.
3. Is Binance a formal platform?
Binance is a formal platform. Binance is a leading international blockchain digital asset station that provides a wide range of Bitcoin transactions, blockchain education, and blockchain services to the world. Chain project incubation, blockchain asset issuance platform, blockchain research institute, and blockchain charity services. Although many of the services provided by Binance are related to blockchain, it is still one of the top Bitcoin trading platforms in the country. Currently, users cover more than 180 countries and regions around the world. With 1.4 million orders/second core memory matching technology, it is one of the fastest platforms for global cryptocurrency transactions and one of the platforms with the largest cryptocurrency transaction volume in the world. Therefore, Bitcoin trading on Binance is very secure, and it has become a favorite Bitcoin trading platform for many investors.

⑵ What is blockchain technology and how does it change business and financial models

Blockchain technology is a distributed ledger technology that allows Multiple participants work together on a decentralized network to maintain a secure, transparent and immutable record. 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 helps increase trust and reduce the risk of fraud.

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.

Improve 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 business 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

⑶ What time does China Merchants Bank system liquidation start and what time does it end?< /p>

The end-of-day processing period is the clearing time, which is the time when the banking system settles savings business every day. The clearing period of the China Merchants Bank system is normally between 0:00 and 2:00 in the morning. The length of time varies, but it usually doesn't last long. Try again after a few minutes.
Extended information:
China Merchants Bank’s “chain” connection for cross-border clearing:
The continued popularity of blockchain has led the financial industry to actively research and apply blockchain technology, which has been used in many fields.Realized the implementation of blockchain applications. China Merchants Bank, which is positioned as a "fintech bank", demonstrated its determination to deploy blockchain with the world's first inter-bank cross-border RMB clearing business based on blockchain technology. "China Merchants Bank hopes to continuously transform itself through financial innovation in the field of blockchain, focus on the origin of transactions, gradually improve financial service capabilities, and realize the social role of financial service experts." said Hou Tingwei, head of the blockchain team of China Merchants Bank.
Cross-border clearing business on the "chain":
The application prospects of blockchain technology in the financial field are widely optimistic, especially in the field of cross-border payment and clearing, it is the most practical and adaptable. Excellent, known as "the most perfect cross-border payment solution", its clearing process is safe, efficient and fast, which can greatly improve customer experience.
On December 18, 2017, China Merchants Bank, as the clearing agent, completed the transfer of RMB positions from Hong Kong Wing Lung Bank to Wing Lung Bank Shenzhen Branch. On December 20, the three parties completed the cross-border RMB remittance business with China Merchants Haitong Trading Co., Ltd. as the remitter and Haitong (Shenzhen) Trading Co., Ltd. in the Qianhai Shekou Free Trade Zone as the payee. The successful launch of the business marks the further application of blockchain technology in the bank, and the participation of three-party institutions means that the plan already has the basis for promotion and cooperation among peers.
Using the "distributed accounting" characteristics of blockchain technology, fund settlement information arrives synchronously "on the chain", is shared by all, and updated in real time, achieving a qualitative leap in settlement efficiency. Blockchain cross-border clearing technology focuses on the efficient and safe transmission of information and complements traditional payment channels, thus avoiding the legality and regulatory issues faced by blockchain electronic currencies.

⑷ Comic illustration: What is blockchain

Comic illustration: What is blockchain

What is blockchain?
Blockchain, English Blockchain, is essentially a decentralized distributed database. Anyone can become a node of this huge network as long as they set up their own server and connect to the blockchain network.
Since the blockchain is essentially a database, what exactly is stored in it? Let’s take a look at the basic unit of blockchain: Block.
A block is divided into two parts:
1. Block header
The block header stores the header information of the block, including the hash value (PreHash) of the previous block. The hash value of the block body (Hash), the timestamp (TimeStamp), etc.
2. Block body
The block body stores the detailed data (Data) of this block. This data contains several rows of records, which can be transaction information or some other information.
What does the hash value just mentioned mean?
Everyone must have heard of MD5. MD5 is a typical hash algorithm that can convert a string of plaintext of any length into a string of fixed length.(128bit) string, this string is the hash value.
In our blockchain, a more complex hash algorithm called SHA256 is used. After a series of complex calculations, the latest data information (such as transaction records) will eventually be converted into a 256-bit hash value string through this hash algorithm, which is the Hash in the block header. The format is as follows:

Blocks and Hash have a one-to-one correspondence, and Hash can be regarded as the unique identifier of the block.
How are different blocks related to each other? Rely on Hash and PreHash to associate. The PreHash value of each block is equal to the Hash value of the previous block.
Why do we need to calculate the hash value of the block?
Since the blockchain is a chain structure, there must be a head node (the first block) and a tail node (the last block) of the chain. Once someone calculates the hash value of the latest data in the blockchain, which is equivalent to packaging the latest transaction records, a new block will be created and connected to the end of the blockchain.
The Hash of the new block header is the hash value just calculated, and the PreHash is equal to the Hash of the previous block. The data in the block body stores the transaction records before packaging, and this part of the data information has become unmodifiable.
This process of calculating Hash values ​​and creating new blocks is called mining.
The server used for massive calculations is called a mining machine.
The workers who operate calculations are called miners.
What is so difficult about calculating hash values? Let’s give the most superficial explanation. The formula for calculating the hash value is as follows:
Hash = SHA-256 (Hash of the last block + basic information of the new block + transaction record information + random number)
Among them, the transaction record information is also a string of hash values, and its calculation involves a data structure Merkle Tree. Interested friends can check the relevant information, we will not introduce it for now.
The key computational difficulty here lies in the generation of random numbers. In order to increase the difficulty of Hash calculation, the wretched inventor of the blockchain requires that the first 72 bits of the Hash result must be 0. This probability is too small.
Since (the Hash of the last block + the basic information of the new block + the transaction record information) is fixed, whether the Hash that meets the requirements can be obtained depends entirely on the value of the random number. Miners must go through massive calculations and repeatedly generate random numbers in an attempt to "get lucky" before they can get the correct Hash and successfully mine.
At the same time, the block header also contains a dynamic difficulty coefficient. When the world's hardware computing power becomes faster and faster, the difficulty coefficient of the blockchain will also increase, making the entire network capable of completing the task every 10 minutes on average. produceCreate a new block.
Friends, do you understand how difficult mining is? It should be added that different blockchain applications are different in details. The mining rules described here take Bitcoin as an example.
Applications of Blockchain

The concept of Bitcoin (BitCoin) was first proposed by Satoshi Nakamoto in 2008, and then based on this idea, open source software and P2P built on it were designed and released. network. Bitcoin is a P2P form of digital currency. Peer-to-peer transmission means a decentralized payment system.
What is a P2P network?
Traditional currencies are uniformly issued by the central bank, and all personal savings are uniformly managed by banks. This is a typical centralized system.
Bitcoin is deployed on a decentralized network composed of many peer nodes around the world. Every node is qualified to record and issue this digital currency.
As for the underlying data storage of Bitcoin, it is based on blockchain technology. Each transaction in Bitcoin corresponds to a row in the block data. A simple diagram is as follows:
Each row of the transaction record contains a timestamp, transaction details, and digital signature.
The table is only for ease of understanding. The actual stored transaction details are anonymous, and only the wallet addresses of the payer and payee are recorded.
As for digital signatures, they can be understood as anti-counterfeiting marks for each single transaction, generated by an asymmetric encryption algorithm.
Next let’s talk about the rewards of Bitcoin miners:
The Bitcoin protocol stipulates that miners who mine new blocks will receive rewards. Starting from 2008, it is 50 Bitcoins, and then halved every 4 years. , currently 12.5 Bitcoin in 2018. The new Bitcoins in circulation are all born in this way. No wonder everyone is so eager to mine Bitcoins!
Advantages and Disadvantages of Blockchain
Advantages of Blockchain:
1. Decentralization
Blockchain does not rely on a central node. The data of the entire system is All peer nodes in the entire network are jointly maintained and can store and verify data. In this way, unless the attacker hacks more than half of the nodes in the entire network, the entire system will not be destroyed.
2. Information cannot be tampered
The data in the block cannot be tampered with. Once the data is tampered with even a little bit, the hash value corresponding to the entire block will change accordingly, and it will no longer be a valid hash value, and the subsequent linked blocks will also be broken.
Disadvantages of blockchain:
1. Excessive consumption of energy
To generate a new block, a large amount of server resources must be used to perform a large number of unnecessary trial calculations, which seriously consumes electricity.
2. Information network delay
Take Bitcoin as an example. Any transaction data needs to be synchronized to all other nodes. The synchronization process will inevitably be affected by network transmission delays., which takes a long time.
A few additional points:
1. Part of the content of this comic refers to Ruan Yifeng’s blog post "Blockchain Introductory Tutorial". I would like to thank this great master for his popular science.
2. Due to limited space, the knowledge about Merkle Tree and asymmetric encryption has not been discussed in detail for the time being. Interested friends can check the information for further study.

⑸ What does blockchain mean?

In the narrow sense, blockchain is a distributed system ledger that is difficult to tamper with and difficult to forge. It consists of db blocks in chronological order. The chain franchise algorithm is designed and guaranteed by cryptographic algorithms. In a broad sense, blockchain applications use data asset structures to verify and store information, use consensus algorithms of distributed nodes to generate and refresh data, and use cryptographic algorithms to ensure the security of data transmission and browsing. The application is composed of automatic scripts. Intelligent contracts, programming and new distributed infrastructure construction and calculation methods using data.

What does blockchain mean?

Blockchain technology is actually equivalent to a decentralized database system, consisting of a long list of db blocks. Each DB block contains a Bitcoin transaction information, which is used to verify the validity of its information and form the next block.

What are the application scenarios of blockchain technology?

The main application areas of blockchain technology include: virtual currency, commodity transaction clearing, data government affairs, verification and anti-counterfeiting label network services and other industries. Ou Sen's block chain is a database technology that links DB blocks in an orderly manner. It is responsible for recording and encrypting file data to ensure that the data cannot be modified or falsified.

Blockchain technology can essentially be a distributed system that is participated in, maintained together, and continuously grown, also known as a distributed shared resource ledger. Each page in the shared resource ledger is a block, and each block is full of transaction details. The anonymity, decentralization, openness, transparency and difficulty in tampering of blockchain have made it favored by enterprises and has been widely used.

⑹ In the 3.0 era of blockchain, how to play blockchain apps

If Bitcoin represents version 1.0 of blockchain, it proves to the world that digital currency can be realized. Then Ethereum represents the 2.0 version of the blockchain, letting everyone know more about how to play the blockchain, decentralized applications and smart contracts. In 2018, blockchain will enter the 3.0 stage. Applications and scenarios will be the core of blockchain. Applications based on blockchain will spring up in various industries. This will be the last stage of blockchain development. early bonus period. The demand for talents driven by the application of blockchain technology has been increasing. Blockchain technology talents have become an upstart profession, highly competitive, and also have enviable high salaries.

More and more large companies are entering the blockchain industry, and Dufeng Huanlv strives to become the "leader" in this emerging field. ThatAlibaba, SF Express, JD.com, etc. have all hired technical talents in the blockchain field with high salaries. In this information age with the Internet as the core, the competition among large companies is ultimately the competition for talents. Especially when the emerging blockchain technology is first emerging, blockchain technology talents are “in hot demand” whether at home or abroad. As a "young" technology, the main force for future development is bound to be young people. However, many current practitioners in the blockchain industry are self-taught and have no systematic professional knowledge training, or are just cryptography, programming, and the Internet. Technical and other unilateral talents. Blockchain technology values ​​​​more complex talents with multiple technologies. In the future, with the maturity of the application of blockchain technology, talented people will become more popular to "recharge" themselves and devote themselves to the blockchain. Be prepared for the heat. In addition to participating in blockchain development work, what else can help you catch up with the blockchain train? Investing in blockchain projects is obviously another approach. So how to judge whether a project is a real blockchain or a fake blockchain?

Is the cost of confirming the authenticity of information in this field very high? For example, there is a Christian coin project, which uses the blockchain to record the time people read the Bible, and then issues Christian coins to these people. Let’s not discuss it for now. Is it meaningful to count the time people spend reading the Bible? Even if it is meaningful, this can be solved using other models. For example, when checking in in a WeChat QQ group, why should we develop a blockchain smart contract and imitate the blockchain? I'm afraid I'm just cutting leeks to keep warm. So what are the areas where it is difficult to confirm the authenticity of information? The most typical one is finance. There is a large amount of information asymmetry in financial markets, which makes the market full of uncertainty. For example, when transferring money, you won't know until the bank tells you that it has arrived. Now blockchain technology can solve such problems better and faster. Similar information confirmation issues such as market data, credit, contracts, etc.

Whether a meaningful large-scale consensus is formed: One of the outstanding advantages of the blockchain is that it can effectively form a large-scale consensus through public ledger accounting and notification to the entire network. Nowadays, for many projects, there is no need to form a network-wide consensus. Some are just for crowdfunding and issuing tokens. The blockchain consensus of the project is meaningless. Does this model have a network effect? ​​The network effect means that a project will become more valuable as the number of project users increases, because the value of the project does not lie in the users themselves, but in the connection network between users. Bitcoin is a classic example. The more user nodes there are, the links between nodes will grow exponentially, and the entire Bitcoin ecosystem will be more valuable.

Of course, in addition to these points, there are many basic principles for judging projects, such as effective incentive mechanisms, strong teams, project solutions to pain points, etc.

⑺ What exactly is the blockchain?

What exactly is the blockchain? In essence, blockchain is a distributed, decentralized network database system that will make the storage, update, maintenance, and operation of data different. Blockchain has four indispensable coresThe core technologies are: distributed storage, consensus mechanism, cryptography principles, and smart contracts.

Then let’s talk about how blockchain is different from traditional data processing to help everyone understand what blockchain is and give everyone a general understanding of blockchain. cognition.

1. Data storage in blockchain: block chain data structure

In terms of data storage, blockchain technology utilizes "block chain data structure" To verify and store data.

What does the blockchain structure mean? Everyone has seen an iron chain, with one link within another. In fact, each link can be regarded as a block, and many links are linked together to form a blockchain.

How does this so-called "iron chain" store data? To put it simply, the difference between blockchain and ordinary stored data is that on blockchain, the data in the next block includes the data in the previous block.

Take reading as an example: when we read a book, we read page 1, then page 2, page 3...
What about in the blockchain? If each block is marked with a page number, then the content on page 2 contains the content on page 1, the content on page 3 contains the content on page 1 and page 2...Page 10 contains The content of the first 9 pages is such a chain nested layer by layer. In this way, the most original data can be traced back. This is the traceability of the blockchain.

The "blockchain data structure" of blockchain makes it traceable, which is naturally suitable for many fields, such as: food traceability, drug traceability, etc. In this way, the probability of tainted milk powder, fake vaccines, and fake and substandard food incidents will be greatly reduced, because once a problem occurs, through traceability, we can clearly know which link caused the problem, and accountability and recovery will be clearer.

2. Data update in the blockchain: distributed node consensus algorithm

In terms of data update, blockchain technology uses the "distributed node consensus algorithm" to Generate and update data.

Every time a new block is generated (that is, when data is updated), an algorithm needs to be used to obtain the approval of more than 51% of the nodes in the entire network to form a new block. To put it bluntly, it is a vote, and it can be generated if more than half of the people agree, which makes the data on the blockchain non-tamperable.

Why do you say that? Let’s make an analogy: we compare the blockchain to a ledger, because it records data. In the traditional world, the bookkeeping power lies with the bookkeeper, and the ledger belongs to the bookkeeper alone. So in the blockchain, everyone owns this account book. If you want to update the account, you must invest.Only if more than half of the people vote in favor can the account data be updated.

In this process, we will involve several terms: distributed, node, consensus algorithm. These terms are actually very easy to understand:

Everyone Accounting (that is, everyone has a ledger, and the ledger is scattered in everyone's hands) is the so-called "distributed";

The accounting method that everyone discusses, votes for, and unanimously agrees on is The so-called "consensus algorithm";

Every person participating in accounting is a so-called "node".

3. Data maintenance in blockchain: cryptography

In the data maintenance stage, the difference of blockchain is that it uses cryptography to Ensure the security of data transmission and access.

The cryptographic principles applied in the blockchain mainly include: hash algorithm, Merkle hash tree, elliptic curve algorithm, and Base58. These principles actually ensure data security on the blockchain through a series of complex operations and conversions.

4. Data operations in the blockchain: smart contracts

A smart contract is a commitment agreement defined and automatically executed by a computer program. To put it bluntly, it is executed with code A set of transaction rules, similar to the current automatic repayment function of credit cards. If you turn this function on, you don't have to worry about anything. The bank will automatically deduct the money you owe when it expires.

The outstanding advantage of smart contracts is that they largely avoid a series of problems caused by trust.
Many of us have encountered the situation of being borrowed money: a friend who is short of money borrows 2,000 yuan from you and promises to pay back the money after the salary is paid next month, but next month he finds other excuses. Also, dragging it around would be pointless. We didn't have much money, but we were still friends. Even though you were depressed, let it go.

Then, after having a smart contract, he cannot default on his debt, because in the smart contract, once the terms in the contract are triggered, the code will automatically execute, whether he wants it or not, as long as he sends Once you have earned your salary and have money in your account, he has to pay you back.

To summarize the contents of this section, there are four indispensable core technologies in the blockchain, namely: distributed storage, consensus mechanism, cryptography principles, and smart contracts.

We can understand it this way: distributed storage corresponds to the data storage stage, the consensus mechanism corresponds to the data processing and update stage, cryptography corresponds to data security, and smart contracts correspond to data operational issues.