BCS Using self-optimized POBC (goodwill certification) as the underlying consensus mechanism, and introducing the real world credit system to provide better operation and support for anonymous block chain network. BCS Focus on the new retail industry with rich landing scenarios, aiming at creating a supply chain traceability, quantifiable credit, transparent data, consumer shopping, membership services, precision marketing, centralized procurement scenarios in one, forming online e-commerce transactions, offline shopping experience, and building a new retail public chain ecology with multi-participation and multi-benefit.