In the vast marine fisheries and maritime shipping industries, the application systems in all sectors are focused on the circulation of funds. Cross-regional production, distribution and trading needs to be credible, stable and efficient circulation of trading channels and currency. OceanChain is a weakly centralized circulation economy system based on the alliance chain, focusing on regulation, settlement, tracing, and consumption of marine fisheries, and completing the closed-loop area of clothing, food, housing, transportation, tourism, shopping and entertainment in the open sea blockchain project.