Time Treaty Chain (Time Treaty Chain) is a public chain that uses composite treaties to define the time and mutual space of block identities. Block IDentity Token, block identity token, abbreviated as BIDT. BIDT is a prototype Token issued and used in the spherical cross-chain ecology of the time treaty chain. It can be compatible with other Tokens or D-Coins in the main chain ecological network, and the effective Token in the ecology is not unique. An infinite number of anonymous, independent, and secure block identities are used as nodes; several in-chain applications that are grounded, innovative, and community-based become super nodes; relying on the triple root contract of mutual trust, security, and transactions to link the cross-chain ecology; together form P*P* P...=PN's TTC block identity spherical ecological chain.