Medical Data Link (MENT) is a public blockchain designed for medical data transmission. It provides a platform for sharing health data based on blockchain technology, incorporating features like high trustworthiness, low-cost security, distributed ledgers, and decentralized consensus. MENT adopts a new smart contract architecture and integrates advanced IoT technology to facilitate a comprehensive transformation of the medical industry, reconstruct the medical ecosystem, and promote the transformation of human medical services. MENT uses a parallel main chain architecture that allows for flexible selection of consensus mechanisms according to the characteristics of the business main chain. The consensus mechanism of the business main chain only affects the particular business, independent of other main chains and forming its own logical space. The consensus mechanism of the business main chain supports plug-and-play mode and can be flexibly replaced according to the demands of digital healthcare, ensuring smooth transition and continued operation. MENT integrates various consensus mechanisms, including POW, POS, DPOS, PBFT, and RAFT, enabling enterprises to develop consensus mechanisms that fit specific needs of digital healthcare....