What's block chain

The blockchain is a shared database, and the data or information stored in it has the characteristics of unforgeable, traceable, traceable, open and transparent, and collective maintenance. Blockchain can be understood as a shared, immutable electronic ledger that can record transactions and track assets in the network. Assets here can be tangible (such as houses and cars) or intangible (such as intellectual property, patents, and brands). Almost anything of value can be tracked and traded on a blockchain network, reducing risk and cost on all fronts. At present, the biggest application of blockchain technology is digital currency, because the essence of payment is to "increase the amount decreased in account A to account B". If people have a public ledger that records all the transactions of all accounts so far, then for any account, people can calculate the amount of money it currently has. The blockchain is precisely the public ledger used to achieve this purpose, which keeps all transaction records. Blockchain originated from Bitcoin. On November 1, 2008, a person who claimed to be Satoshi Nakamoto published the article "Bitcoin: A Peer-to-Peer Electronic Cash System", explaining that based on P2P network technology, The architectural concept of the electronic cash system, such as encryption technology, time stamp technology, blockchain technology, etc., marks the birth of Bitcoin. Two months later, the theory entered practice, and on January 3, 2009, the first genesis block with serial number 0 was born. A few days later, on January 9, 2009, a block with serial number 1 appeared, and was connected with the genesis block with serial number 0 to form a chain, marking the birth of the blockchain.