HOTCS is a big health intelligent ecological public chain, which aims to use blockchain technology to record personal health data, create personal health files, and develop safe and controllable health applications. HOTCS hopes to use blockchain technology to combine personal health data and health diagnosis and treatment data and make them digital assets, and realize the security, privacy, accuracy and scalability of personal health data through encryption technology. Make full use of smart contracts to create personal health data NFT, build an integrated digital health ecosystem that integrates individuals, medical institutions, artificial intelligence, insurance and other companies to operate and maintain, so that the personal health data of participants is more secure and reasonable and can be accurately used In medical security, promote the development of the health care industry and fission its industrial value.