CTI provides mutual sincerity electronic signature system services related to electronic identity authentication and software testing, mutual sincerity signature, an electronic signature system tailored for the TIC industry. The use of an authoritative third-party CA conforms to the Electronic Signature Law and meets the urgent needs of testing institutions for anti-counterfeiting, mass issuance, and traceability of electronic reports. 2) Mutual signature management services such as special design qualification stamps, risk stamps, special inspection and testing stamps and signature stamps of third-level inspectors for the TIC industry, and are highly compatible with various LIMS system businesses, which are convenient for user management and Fast integration. 3) Mutual Signing is based on a mature and stable service architecture, unique multi-threaded concurrent design and large file processing technology, so that it has a stable and efficient signature processing capability, and adopts advanced DOCKER container technology, which makes the service easy to deploy and easy to expand.