The YKChain project mainly serves large-scale health care projects. It is mainly to solve the difficulties in user data statistics, lack of payment methods, repeated payments, and cross-regional consumption that health care companies find in the process of business development. This project uses DApp to provide real-time and credible data support for the platform, so that enterprises can collect health data that customers care about in real time and give feedback to users, issue tokens, solve problems such as repeated payments and cross-regional consumption, and allow users to realize once Pay for nationwide convenience.