October 25 blockchain
blockchain includes public blockchain, joint (instry) blockchain and private blockchain. Public chain point-to-point e-cash system: bitcoin, smart contract and decentralized application platform: Ethereum
blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies
blockchain is an important concept of bitcoin. In essence, it is a decentralized database. At the same time, as the underlying technology of bitcoin, it is a series of data blocks generated by using cryptographic methods. Each data block contains a batch of bitcoin network transaction information, Used to verify the validity of its information (anti-counterfeiting) and generate the next block
extended data
according to the different degree of blockchain network centralization, three kinds of blockchains under different application scenarios are differentiated:
1. The blockchain with the whole network open and without user authorization mechanism is called public chain
2. The authorized nodes are allowed to join the network, and the information can be viewed according to the authority. It is often used in the inter agency blockchain, which is called alliance chain or instry chain
3. All the nodes in the network are in the hands of one organization, which is called private chain
alliance chain and private chain are also called licensing chain, and public chain is called non licensing chain
blockchain features
1, decentralization. Blockchain technology does not rely on additional third-party management institutions or hardware facilities, and there is no central control. In addition to the self-contained blockchain itself, each node realizes information self verification, transmission and management through distributed accounting and storage. Decentralization is the most prominent and essential feature of blockchain
2. Openness. Blockchain technology is based on open source. In addition to the private information of all parties involved in the transaction is encrypted, the data of blockchain is open to everyone. Anyone can query blockchain data and develop related applications through the open interface, so the information of the whole system is highly transparent
3. Independence. Based on consensus specifications and Protocols (similar to various mathematical algorithms such as hash algorithm used by bitcoin), the whole blockchain system does not rely on other third parties, and all nodes can automatically and safely verify and exchange data in the system without any human intervention
4. Safety. As long as 51% of all data nodes cannot be controlled, the network data cannot be arbitrarily manipulated and modified, which makes the blockchain itself relatively safe and avoids subjective and artificial data changes
5. Anonymity. Unless there are legal requirements, technically speaking, the identity information of each block node does not need to be disclosed or verified, and the information can be transferred anonymously
Public chain, also known as "public chain", refers to the blockchain that anyone in the world can enter the system at any time to read data, send confirmatory transactions and compete for bookkeeping. The public chain is generally considered to be "completely decentralized", because no indivial or institution can control or tamper with the reading and writing of data in it. In terms of application, blockchain public chain mainly includes bitcoin, Ethereum, super ledger, most counterfeit currencies and smart contracts. The ancestor of blockchain public chain is bitcoin blockchain, which has the following characteristics:
1, open source code
upload the code to GitHub, and everyone can get complete blockchain data by downloading, Accept the test of the public
2, complete decentralization
anyone can become a node, each node is open, everyone can participate in the calculation of the blockchain, any node is not permanent, but phased, and any center is not mandatory for nodes. Anyone can read and send transactions, and transactions can be effectively confirmed on the blockchain. Anyone can participate in the consensus process. The consensus process determines whether a block can be added to the blockchain and the exact current state. Everyone can get financial reward from it, which is proportional to their contribution to the consensus process. These public chains are generally considered to be "completely decentralized"
3. Developing decentralized applications
through this public chain, developers can easily develop centralized applications. Public chain can protect the rights and interests of users from the influence of program developers
Blockchain Yearbook: since the second half of 2016, more than 10 blockchain instrial parks have been established or will be established in China. In addition to Shanghai, Hangzhou and Guangzhou, which have been maintaining a strong momentum in the field of Finance and science and technology, other provinces and cities such as Wuhan, Chongqing, Qing and Suzhou have also laid out blockchain instrial parks Blockchain Yearbook not only summarizes the latest detailed information of global blockchain instrial parks, but also includes the support policies of local governments for blockchain
according to the blockchain Yearbook, as of the end of November 2018, the number of blockchain companies with blockchain as the main business in China has reached nearly 1000, and the instry has initially taken shape. At present, many local governments are also actively positioning blockchain technology from the instrial height, and the policy system and regulatory framework are graally developed and improved
I. blockchain Instrial Park
1. Shanghai Collaborative Innovation Center was established in the earliest but the lowest profile
in November 2016, Zhongguancun blockchain instry alliance and Shanghai Intellectual Instrial Park reached cooperation to jointly create Zhongguancun blockchain Instry Alliance Shanghai collaborative innovation center. At the same time, Shanghai intelligence instry sky blockchain incubation base and Shanghai equity trading trusteeship center were officially established, which means that China's first application blockchain incubation base is officially located in Baoshan, Shanghai
according to the regulations of the park, all kinds of enterprises registered in the park will be given a certain proportion of supporting policies according to the contribution of the enterprises
on the day of the establishment of Shanghai Collaborative Innovation Center, Shanghai Ruizi Investment Management Co., Ltd., Shanghai kuaibei Network Technology Co., Ltd. and Shanghai miaojao Network Technology Co., Ltd. entered. Nearly two years since its establishment, the low-key park has not been exposed much
2. Hangzhou has three blockchain entrepreneurial Parks: occupying the right time, favorable location and favorable people
in the 2018 government work report, the Hangzhou government explicitly listed the blockchain instry as one of the seven future instries to be cultivated in Hangzhou. At present, Hangzhou has formed three major blockchain instrial parks represented by xixigu blockchain Instrial Park, China (Xiaoshan) blockchain entrepreneurship and innovation base, and China Hangzhou blockchain Instrial Park
xixigou blockchain Instrial Park was established in April 2017, located in xixigou Internet Finance Town, Qianjiang Xixi Hejing, and invested and operated by Hangzhou urban investment asset management group
China (Xiaoshan) blockchain entrepreneurship and innovation base was established by the cooperation of China Institute of electronic technology standardization, Hangzhou Xiaoshan District People's government and China Wanxiang Holding Co., Ltd., and settled in Xiaoshan in May 2017
China Hangzhou blockchain Instrial Park, located in Yuhang District, was established in April 2018, and Li Xiaolai, the big man of the currency circle, also attended the ceremony. At the launching ceremony, Yao Yongjie, chairman of Hangzhou longlan investment, announced the establishment of xiong'an global blockchain innovation fund with a total scale of RMB 10 billion
3. Wuhan blockchain Instrial Park encourages college students to start blockchain businesses
Beijing
on November 9, 2018, Zhongguancun Management Committee, Beijing Municipal Bureau of financial work and Beijing Municipal Commission of science and technology jointly issued the "Beijing financial technology development plan (2018-2022)"
the plan brings blockchain technology into the scope of Beijing's "financial technology" development plan, actively promotes the development of underlying technologies that affect the application of financial technology functions, and improves all kinds of technology market facilities, including artificial intelligence, big data, Internet technology (mobile Internet, Internet of things), distributed technology (cloud computing, blockchain), security technology (quantum computing Biometrics, encryption technology, etc
on September 29, 2017, the Beijing Municipal Bureau of financial work and other eight departments jointly issued the implementation measures for the construction of the capital's green financial system, which mentioned the development of green financial information infrastructure based on blockchain and the improvement of the security level of green financial projects
on April 6, 2017, the Management Committee of Zhongguancun Science and Technology Park printed and issued the "ZhongGuanCun national independent innovation demonstration zone to promote the deep integration of science, technology and finance, innovation and development support fund management measures", which mentioned that financial technology enterprises should be supported to provide services for financial regulators and financial institutions, and carry out the demonstration and application of artificial intelligence, blockchain, quantitative investment, intelligent finance and other cutting-edge technologies, Improve the efficiency and convenience of financial services
enterprises shall be given financial support according to 30% of the amount of technology application contract or purchase agreement signed between financial technology enterprises and financial regulators or financial institutions, and the maximum amount of support for a single project shall not exceed 5 million yuan
on December 30, 2016, the Beijing Municipal Bureau of financial work issued the "13th five year plan for the development of financial instry in Beijing", which mentioned that blockchain should be classified as a technology of Internet Finance and encouraged the development of this technology
on August 10, 2016, Beijing Municipal Bureau of financial work issued the performance tasks of Beijing Municipal Bureau of financial work in 2016, in which Article 8 mentioned promoting the introction of Zhongguancun Internet finance comprehensive pilot scheme and the establishment of Zhongguancun blockchain alliance
Shanghai
on April 28, 2017, the Shanghai Internet Finance Instry Association issued the self discipline rules for blockchain technology application of Internet Finance practitioners, which requires blockchain technology to serve the real economy, pay attention to the balance between innovation and standardization, and security, and clarify the bottom line of financial stability and information security, Internet financial institutions applying blockchain technology should report to local regulatory authorities and instry self regulatory organizations, and actively accept instry supervision and self regulatory management. The reporting information should at least include project name, responsible person, business model, business risk, risk control measures, etc
on March 7, 2017, the development and Reform Commission of Baoshan District of Shanghai printed and issued the key points of financial services in Baoshan District in 2017. It was mentioned that the construction of Miaohang blockchain incubation base and Songnan Shanghai Internet finance evaluation center should be followed up to promote the development of financial technology companies as an important part of Baoshan financial ecosystem relying on professional teams and market forces, We should form a development model in which venture capital funds and angel investors gather actively, science and technology finance support is strong, and enterprise investment motivation is fully stimulated
On December 8, 2017, the office of the people's Government of Huangpu District and the office of the Management Committee of Guangzhou Development Zone issued the measures for promoting the development of blockchain instry in Guangzhou Development Zone, Huangpu District, Guangzhou, aiming at the instrial and commercial registration place, tax collection and management relationship and statistical relationship within Huangpu District, Guangzhou Development Zone and its entrusted management and subordinate parks, Blockchain enterprises or institutions with sound financial system, independent legal personality, and commitment not to move away from their registered and office address within 10 years, not to change their tax obligations in the area, and not to rece their registered capital shall implement incentive measures such as cultivation award, growth award, platform award, Application Award, Technology Award, financial support, activity subsidy, etc. This is the biggest policy measure in China at presenton September 25, 2017, the Shenzhen Municipal People's Government printed and issued several measures to support the development of the financial instry in Shenzhen. It was mentioned that the financial technology special award focuses on excellent projects in the fields of blockchain, digital currency, financial big data application, and the annual award amount is controlled within 6 million yuan
on August 17, 2017, Shenzhen Economic and trade and Information Commission issued the notice of Shenzhen Economic and Trade Information Commission on organizing and implementing the 2018 special support plan for information security of new generation information technology in Shenzhen strategic emerging instries, which mentioned that it is necessary to support blockchain technology
on November 3, 2016, the Financial Development Service Office of Shenzhen Municipal People's government issued the 13th five year plan for the development of Shenzhen's financial instry, which mentioned supporting financial institutions to strengthen the research and exploration of emerging technologies such as blockchain and digital currency
Chongqing
on March 7, 2018, Chongqing municipal government issued the notice on implementing and promoting the task division of the guidance on supply chain innovation and application, which mentioned that it is necessary to study the use of blockchain, artificial intelligence and other emerging technologies to establish a credit evaluation mechanism based on supply chain
on November 7, 2017, Chongqing Economic and Information Technology Commission issued the opinions on accelerating the cultivation and innovative application of blockchain instry. It is mentioned that by 2020, we will strive to build 2-5 blockchain instry bases in Chongqing, introce and cultivate more than 10 leading enterprises in the domestic subdivision field of blockchain, and more than 50 blockchain enterprises with core technology or growth type, The introction and cultivation of more than 500 middle and senior talents in blockchain will build Chongqing into an important instrial highland and innovative application base of blockchain in China
the participating enterprises or teams include Wanda, decent, sesame credit, latte finance, bitcoin China, etc.
besides, blockchain is a very cutting-edge technology at present. China must pay attention to it, and the boss's instructions are timely and necessary.