SDAO will develop a secure, decentralized, autonomous ecosystem with digital simplicity and fast processing capabilities, which fully considers the technical characteristics of the blockchain industry and the needs of network ecological construction. In terms of user credit identity management, P2P communication, encryption algorithm, consensus algorithm, smart contract, cross-chain contract mode, decentralization, and quick access to new services have realized the seamless integration of the bottom layer of the blockchain and the network ecology. The goal of SDAO is to build a secure DeFi ecosystem and provide users with a complete decentralized financial infrastructure. DeFi (Decentralized Finance), that is, "decentralized finance", its core is openness, fairness, and interconnection. SDAO will build a safe and reliable financial service ecological platform based on distributed ledger and blockchain technology.