The full name of DSF, Decentralized Social Finance, is a decentralized social finance blockchain. DSF is developed based on Ethereum and is positioned as the most important link in the Ethereum’s DeFi ecosystem, namely. Through the innovative R&D on-chain social contract system, all social relationships between users in DSF are recorded on the blockchain, and deep integration with various DeFi decentralized finance applications through on-chain social contracts to bring decentralized finance applications include revolutionary innovations in product design, promotion, and services in multiple dimensions. From this perspective, DSF is the infrastructure for the next generation of DeFi applications. DSF has a research and development team combining more than a hundred people with BAT Messenger. At present, its encrypted social app Dechat has hundreds of thousands of users, and is continuously integrated with the BAT Messenger community with tens of millions of users. DSF is expected to launch the Staking network and social DeFi applications in 2020-2021, including decentralized social lending, decentralized social investment and finance management, decentralized social e-commerce, and decentralized social insurance.