On November 11th, at the 2019 Global Blockchain Industry Summit, Dai Kee, founder of Sesame Credit, said that in the Internet era, big data credits are facing the problem of data silos. At the same time, the Internet cannot solve the security and responsibility of data providers. Worry. The blockchain can solve the problem of data islands well. It can do two things: data encryption and data can not be leaked. There are two things to do in order to use the blockchain: 1. Synchronize data to the chain; 2. Provide incentives for organizations that provide data. In the Sesame Credit, the POD (prove of Data) model is adopted. Dai celebrates that the blockchain can solve the problem of credit reporting more than the Internet. It can even be said that the blockchain is the best technology for solving big data credits.