Babbitt reported on the 8th, November 8th, 2019 World Blockchain Conference·Wuzhen officially opened at Wuzhen Internet International Convention and Exhibition Center. In the afternoon of the "Technology Unbounded: Blockchain Underlying Infrastructure" sub-forum, Zhang Yifeng, dean of the China Banknote Blockchain Technology Research Institute, said that digital identity is one of the infrastructures that promote the widespread use of blockchains in the digital world. In this case, the identity evolves from an application account to a federated identity and digital certificate. The next generation of digital identity (ie, distributed digital identity) consists of identity data, digital certificates, and verifiable claims, characterized by flexible, flattened Distributed authentication method. He also pointed out that by combining distributed digital identities with real-world business and leveraging the features of blockchain technology, new and innovative applications can be built. Your distributed digital identity is used and streamed by individuals, and objects mapped on the blockchain can be ordered and determined.