TDC is the development of a self-developed Shuoyuan system based on blockchain technology. TDC is based on the Chinese, Southeast Asian and European markets. Through the deep integration of blockchain technology and credit economic models, the list of dishonest persons is shared among the members of the alliance, and the islands of credit data are connected in series to form a real, reliable and wide-coverage whole society. Credit database, effectively promote and improve the social credit system, and finally realize the equality of everyone before credit. The TDC project has epoch-making significance in terms of promoting the development of the global credit society with scientific and technological means.