Web3 is a new concept that is emerging in recent years. To build a Web3 system, you need to have a decentralized account system first, as you need to have a computer to get access to Web2. Thanks to the rising trend of DeFi in 2020 and NFT in 2020, the user base of MetaMask and other decentralized wallets has been exploding. This is the foundation of Web3. After users have an account and add some assets to their wallets, they naturally need a “social identity” to tell who they are on Web3. It is a key infrastructure of Web3 but was blank when we started the project.