What is a ternary food inspection unit?

Sanyuan food inspection unit is Hunan Sanyuan Inspection Co., Ltd. ... Tangshan Sanyuan Food Co., Ltd. was established on July 2, 20201,and is a state-owned subsidiary of Beijing Sanyuan Food Co., Ltd., a pillar enterprise of the group, which is juxtaposed with Hebei Sanyuan and Qian 'an Sanyuan. Beijing Sanyuan Food Co., Ltd. (hereinafter referred to as Sanyuan Food) is a Chinese-foreign joint-stock enterprise mainly engaged in dairy industry and also engaged in McDonald's fast food. Its predecessor was Beijing Milk Station, which was established in 1956.