According to Tencent Technology News, on July 10, China Electronic Technology Network Information Security Co., Ltd. (hereinafter referred to as: China Net An), Tencent and Beiming Software Co., Ltd. (hereinafter referred to as: Beiming Company) jointly issued judicial blockchain applications. The ecological service platform – "to the letter chain", will officially provide services in August. “To the letter chain” aims to provide the society with safe, authoritative, objective and fair judicial blockchain application services. In the construction of “To the letter chain”, China Netan is responsible for the technical cooperation, security capacity building and follow-up operation of “To the letter chain”. Tencent is responsible for providing the technical support and open ecology of “to the letter chain”, Beiming The company is responsible for the organization and management of the “to the letter chain” ecosystem and business operations.