The bank is going to be subverted. This popular speech clearly shows what blockchain is.

In theory, blockchain can subvert banks, but in fact there is still a long way to go.

In layman's terms, blockchain technology refers to a way for all people to participate in bookkeeping. There is a database behind all systems. You can think of the database as a big ledger. Then it becomes very important who will keep this account book. At present, whose system is responsible for bookkeeping, WeChat's account book is kept by Tencent, and Taobao's account book is kept by Ali. But now in the blockchain system, everyone in the system can have the opportunity to participate in bookkeeping. If there is any data change in a certain period of time, everyone in the system can come to keep an account. The system will judge the fastest and best bookkeeping person during this period, write his recorded contents into the account book, and send the contents of the account book to everyone else in the system for backup. In this way, everyone in the system has a complete account book. In this way, we call it blockchain technology.

Blockchain is just a technology that can be applied to many industries, such as logistics, crowdfunding, law, stocks and securities. Nasdaq, mainland crowdfunding, Wal-Mart, Wanda, Tencent and so on.