Rainbow Zone Protocol is a blockchain local area network system on Cosmos. The vision is to build a secure, governable, scalable, and agile iterative blockchain ecosystem, and strive to become a high-traffic ecological platform for blockchain Internet . Rainbow Zone customizes the application layer protocol RBZ_Protocol on the basis of Cosmos' network layer and consensus layer. It consists of core elements such as service definition SD, state protocol SP, contract RC, and traceability protocol TP. In a parametric and pluggable way, Rainbow Zone implements an immutable ledger with a healthy ecosystem. It can be programmed for specific use cases and has governance autonomy. It can become a hub of the Cosmos ecosystem and an independent zone. Blockchain public chain.