The total issuance amount of FP (Flow Pay) is 1 billion, and users receive rewards through contribution value and purchasing computing power. The reward FP is applied to all interfaces of the city protocol. The FP payment underlying application public chain solves the shortcomings of traditional payment (centralized management) by designing payment super nodes based on FP. The settlement of traffic generated by all entities enters the entire computing pool and then feeds back to users with computing power at all nodes, resulting in a self ecological mechanical table function. It operates on the kinetic energy of traffic and is a self circulating ecosystem, accompanied by multi scenario modular payment and AI payment supervision, bringing a new "payment as mining" business model to the entire third-party payment market....