Certificate and file chain (CFC) is a decentralized blockchain digital asset, which is based on the digital token issued by Ethereum and applied to all application scenarios of the Certificate and file chain platform.CFC provides a platform for storing all certificates on the chain and providing certificate query and certification. The certificate chain has the core technology of low latency and high concurrency in matchmaking trading systems.The greatest significance of certificates lies in the authenticity of their content, but traditional certificates have problems such as being easily lost, destroyed, modified, difficult to query, and difficult to distinguish between authenticity. The decentralized, distributed storage, immutability, and transparency of blockchain provide strong technical support for certificate preservation and notarization. Blockchain technology has absolute advantages, wide application scenarios, and enormous value in the field of certificates....