They are all companies within the public system of China. According to the data of Zhonggong Education and Zhonggong Hi-Tech, Zhonggong Education and Zhonggong Hi-Tech are both companies within the Zhonggong system. Zhonggong Education Group was established in 1999. After a period of painstaking development, Zhonggong Education has developed from an information technology and education service institution for independent graduates in Peking University to a comprehensive enterprise group in the education service industry, and has become a large-scale knowledge industry entity integrating face-to-face teaching and training, online distance education, publication and distribution of books, teaching materials and audio-visual products.