The health chain is based on blockchain, artificial intelligence, Internet of Things and other technologies to realize the intelligent medical value chain - the health chain. The health chain protocol consists of four modules: security, authentication, intelligent network, and data storage, which are the bottom layer of HELC service, the health chain will also be connected to other DAPPs with artificial intelligence capabilities, and continuously expand the capabilities of HELC. The health chain connects medical examination institutions, insurance companies, medical institutions, medical technology service companies, users, doctors..., so that everyone in the chain can create value, contribute value, and share value.