Background based on blockchain

1. This instry, which needs policy support, will be led by the government. It is in the charge of the Management Committee of Changsha high tech Zone. The sponsors are mainly Hunan souyun, China Securities and Technology Corporation, etc., so that enterprises in the circle of blockchain can have better communication. It is said that some blockchain salons will be held in the future.

2. Traditional transactions on the Internet need to rely on trusted third-party institutions to process electronic payment information, and both parties trust the third-party institutions However, the third-party intervention also has many disadvantages:< Br > - high transaction cost (a certain handling charge)< Br > - Privacy exposure (the third party needs to provide the information of both parties in order to verify the information)< Br > -... < br > imagine that if the third-party organization is removed and the two parties trade directly, how can the transaction take effect? The emergence of blockchain technology is to solve this problem. Blockchain is based on the principle of cryptography rather than trust mechanism, which makes the two parties reach an agreement to trade directly and publish it to all witnesses.

3. Since 2008, Nakamoto has proposed bitcoin, a peer-to-peer cash trading system. Since then, it has entered the eyes of the world.

4. Traditional transactions on the Internet need to rely on trusted third-party institutions to process electronic payment information, and both parties trust the third-party institutions Taobao buyer - Taobao platform - Taobao seller)
but the third party intervention also has many disadvantages:
- high transaction cost (a certain handling charge)
- Privacy exposure (the third party needs to provide the information of both parties in order to verify the information)
-...
imagine that if the third-party organization is removed and the two parties trade directly, how can the transaction take effect? The emergence of blockchain technology is to solve this problem. Blockchain is based on the principle of cryptography rather than trust mechanism, which makes the two parties reach an agreement to trade directly and publish it to all witnesses.

5. A brief review of the origin of blockchain
blockchain is the underlying system of distributed ledger in bitcoin. Bitcoin ledgers are built in a distributed and spontaneous way. Anyone can generate new currency blocks by performing specific cryptographic calculations, so as to obtain a digital "currency" that can be used for transactions. Bitcoin's impact on the world monetary system can be said to be subversive, which is also an important reason why it has attracted a lot of people's strong attention since it came out. After that, there were dozens of similar electronic currencies such as
"lightcoin". The abstract extraction of distributed digital currency technology from bitcoin forms a "blockchain" technology, which can be used in more fields
the basic idea of blockchain is to establish a network-based public ledger (data block), each block contains the information of a network transaction. All the participating users in the network work together to keep accounts and check accounts. All the data are open and transparent, and can be used to verify the effectiveness of the information. In this way, the authenticity and non tamperability of information can be guaranteed at the technical level without the central server as the trust intermediary
the significance of blockchain lies in "decentralization", which can fundamentally solve the fraud and rent-seeking phenomenon in value exchange and transfer by building a more reliable network system. With the popularization of blockchain technology, the digital economy will be more authentic, and the economic society will become more fair and transparent
not only digital currency, but also blockchain technology is infiltrating into more innovative fields.
virtual digital currency such as bitcoin is just an application scenario of blockchain technology. Theoretically speaking, based on the characteristics of blockchain technology, human beings can create a very rich form of services and procts, such as finance, government, enterprises, etc There are a large number of scenarios suitable for blockchain technology in cross instry and other fields, with broad prospects. At present, many countries around the world have started the research of blockchain technology, and a series of instry organizations and alliances have been established. However, as blockchain technology is a brand-new technology, which subverts the traditional centralized mode, major institutions are still in the research stage, with only a small number of actual projects landing, and the great development of the instry has just begun
now, blockchain economy is on the eve of outbreak. The exploration of financial instry is ahead of others, while the application of other instries is developing rapidly. The obvious advantage of blockchain instry application is to optimize business process, rece operation cost and improve collaborative efficiency. This advantage has been graally reflected in financial services, Internet of things, public services, social welfare and supply chain management
as the backbone of emerging technologies, blockchain is not only used in the field of virtual currency, but also in other fields such as finance, medical care, intellectual property certification, etc. a large number of excellent enterprises have emerged in China to explore or enter the blockchain instry. According to the in-depth analysis report on business model innovation and investment opportunities of blockchain instry released by foresight Instry Research Institute, as of the end of 2016, there were 105 blockchain related enterprises in China, 80% of which were concentrated in eastern coastal cities, including Shanghai, Hangzhou and Taipei
from the perspective of global blockchain technology application development, as of April 2017, financial service companies accounted for 55.43% of the 267 blockchain venture capital companies; From the perspective of the Chinese market, 34 of the top 50 blockchain venture capital companies in 2016 are involved in financial services, mainly in cross-border payment, bill discounting and financial service platform<
analysis of the development trend of blockchain
the combination of blockchain and cloud computing is more and more close, and baas is expected to become a public trust infrastructure
cloud computing is the general trend. We believe that the combination of blockchain and cloud is also an inevitable trend. There are two modes for the combination of blockchain and cloud, one is blockchain in the cloud, the other is blockchain in the cloud. The latter, namely baas, blockchain-as-a-service, refers to that the cloud service providers directly provide blockchain as a service to users. In the future, more and more cloud service enterprises will integrate blockchain technology into the ecological environment of cloud computing. By providing baas function, they can effectively rece the deployment cost of enterprise application blockchain and rece the initial threshold of innovation and entrepreneurship
the security problem of blockchain has become increasingly prominent, and security protection needs the overall consideration of technology and management
blockchain system is almost perfect mathematically, with the advantages of openness and transparency, difficult to tamper, reliable encryption, anti DDoS attack, etc. However, from the engineering point of view, its security is still restricted by infrastructure, system design, operation management, privacy protection and technology update iteration. In the future, we need to consider the overall situation of technology and management, strengthen basic research and overall protection, so as to ensure the application security
the competition of blockchain is becoming increasingly fierce, and patent competition has become an important field of competition
with the increase of participants, the competition of blockchain will become more and more fierce, and the competition is all-round, including technology, mode, patent and other dimensions. We believe that in the future, enterprises will strengthen the layout of blockchain patents. Since 2014, the number of blockchain patent applications has grown explosively. Blockchain patents are mainly distributed in the United States in North America, the United Kingdom in Europe, China and South Korea in Asia, and this pattern will be maintained in the future. The patent gap between China and the United States is narrowing, and the number of applications in China in 2016 has surpassed that in the United States. It can be predicted that the patent competition of blockchain will become increasingly fierce in the future
with the acceleration of domestic policy process, the development of the instry ushers in a new opportunity
blockchain has attracted attention from all walks of life e to its core advantages of high performance, high security, high-speed access, efficient operation and so on. In the context of the rapid development of blockchain, China conforms to the needs of globalization, closely follows the international pace, and actively promotes the research, standardization and instrialization development of domestic blockchain related fields
trustworthiness is the core requirement of blockchain, and the importance of standards and specifications is becoming increasingly prominent
in the future value delivery network based on blockchain, we will completely use algorithms and software to build the trust foundation. However, we believe that this is far from enough, and we need the standard to increase the credibility of the blockchain. In the future, the standard of blockchain will standardize the technology and governance of blockchain from the perspective of users, business oriented, and from the dimensions of smart contract, consensus mechanism, private key security, and authority management, so as to enhance the credibility of blockchain and add weight to the trust of blockchain.

6. Changsha urban blockchain public platform project was officially launched at the "2019 Internet Yuelu summit" blockchain Technology Application Forum with the theme of "cross border integration, chain creating the future" sponsored by Changsha high tech Zone.

7. First, the computing power sources of POS and POW are different
first of all, in POW mining, it is the computing speed of mining machines (CPU, graphics card, ASIC, etc.) that determines who can dig the ore better, while in POS there are differences. POS mining does not require you to purchase additional mining equipment, nor does it take up a lot of computing resources

Second, the number of coins issued by POS and POW is different
originally, in pow, the bitcoin proced by a block has nothing to do with the coins you held before. However, in POS, the more money you originally hold, the more money you dig. For example, if you have 1000 coins that have not been used for half a year (183 days), the amount of coins you dig is as follows:
1000 (number of coins) * 183 (age of currency) * 15% (interest rate) = 274.5 (coins)

8.

You need to bring your social security card and ID card

one, two ways to apply for printing:

1, provide my valid identity card to the local social security agency to apply. In case of entrusting others to handle the case, the valid identity documents of the entrusting party and the entrusted party shall be provided at the same time

2. With social security card (citizen card), second-generation ID card or certified online user name, social insurance self-service all-in-one machine can print insurance certificate, and social insurance agencies can be required to affix "social insurance business seal"< 2. The insured unit shall provide the letter of introction and the applicant's valid ID card to the local social security agency for application

if the social security bureau can't find your social security payment records, it's impossible to issue a social security insurance certificate for you, and your work unit needs to have the insurance records for you

extended information:

social security certification disclosure process

social security certification is one of the most important materials, such as children's ecation, pension and some transfer, but most people do not know how to open social security certification and what matters need attention. We need to make some necessary preparation and study

but now the social security policy stipulates that any person who registered residence is to move in through legal means. The employer should timely handle the social security payment proceres for the transferred personnel to the city, and pay the social security fee according to the personnel standards of Guangzhou Municipality. p>

just provide the household register or ID card to inform the employer, and let the employer handle the change proceres for it. If the employer does not agree, it can report to the relevant departments and use the weapon of law to safeguard its legitimate rights and interests

the employer should pay the social security fee for the employee from the date of establishing the labor relationship with the employee. If the payment is not made, the unit can go to the counter to handle the payment proceres for the employees with the help of the labor contract. With the development of the Internet, many certificates can be downloaded and printed online. For those who fail to pay after participating in the insurance as an independent indivial, they need to carry their ID cards to the counter of the local tax bureau to handle the supplementary payment proceres within three months of the interruption of payment

for those who are paid by third-party organizations such as "haoyibao", they can help provide social security certificates