Learning Times today published "The most important thing about blockchain is still in operation." According to the article, whether the blockchain can be used well, the most important thing is to operate. Only after operation can we know where all the problems are. What is a blockchain? If you do n’t make it credible, you become a fake, and 51% of the credibility of all the blockchains behind you will become a fake of the whole chain, becoming increasingly scary. In this process, especially the government, in the process of urban governance, how to plan various technologies and security is an important matter.