The SAFE(AnWang) Network is a decentralized, secure payment and privacy computing blockchain system focused on privacy protection, which was launched by the Singapore SAFE Foundation in October 2014. It has been nine years since then. During this period, it has experienced the iterative replacement of three major versions of DNC 1.0, DNC 2.0 and SAFE 3.0, and made many beneficial explorations in various innovative technologies and commercial applications. Based on cryptography theory and privacy computing, and guided by technology innovation and application innovation, SAFE 4.0 focuses on privacy protection, strengthens secure payment, optimizes asset privacy, imports cross-chain assets and stable currency, creates SAFESwap trading field, expands more commercial applications, and aims to build a global privacy protection ecosystem.