Real name authentication. China Enterprise Cloud Chain is an Internet-based supply chain financial service platform led by CRRC and jointly built by central enterprises such as China Railway Construction and SINOMACH. The private key contained in ukey can only be held in the specified identity, and the identity authentication can be realized through ukey's signature, so the cloud chain of Chinese enterprises should be bound with ukey. China Enterprise Cloud Chain (Beijing) Financial Information Service Co., Ltd. (referred to as "Cloud Chain Finance") is an Internet-based supply chain financial service platform.