HAC Health Alliance Chain was established by HAC Indonesia Foundation. An open platform that provides a series of value-added services for the global big health industry is also the first public chain of "blockchain+big health industry". The HAC ecosystem has a two-node mining mode, the first layer is the blocking node, and the second layer is the mining node. Users are encouraged by HAT pass according to their contribution to ecological construction. As the only pass of value circulation in HAC ecology, hat anchors value with material standard, and the dual drive of market circulation promotes the continuous deflation of hat pass. This also means tHAT community members who hold hat can get more rights and interests.