Safe is a decentralized blockchain secure payment and privacy computing platform focused on digital asset privacy protection, launched by the Singapore SAFE Foundation in October 2014. As of July 2021, it has a history of 7 years, during which it has undergone iterative changes from three major versions: Anwang 1.0, Anwang 2.0, and Anwang 3.0, and has conducted numerous beneficial explorations in various innovative technologies and commercial applications. With many years of industry practice experience and achievements, based on Cryptography theory and privacy computing, guided by technological innovation and application innovation, Anwang 4.0 focuses on privacy protection, strengthens secure payment, optimizes asset privacy, introduces cross chain assets and Stablecoin, creates a safeswap market, and expands more commercial applications, aiming to build a global privacy protection ecosystem....