Credit Tag Chain is an underlying public chain dedicated to building a new ecological foundation for the financial industry. Credit Tag Chain opens up customizable data and smart contract interfaces, and supports the on-chain of all-round financial value from personal-level credit data to enterprise-level asset data. CTC promotes the circulation of data in the ecology through the query mechanism and smart contract mechanism; users can obtain new data and value through the integration and operation of big data on CTC, which becomes a new driving force and catalyzes the integration and split innovation of application scenarios , forming a positive new financial ecological closed loop, and finally building a new pattern of financial scenarios based on the CTC blockchain.