Nine o'clock. The printing shop in Chenggong Campus of Yunnan University usually opens at 8 am and closes around 9 pm. Yunnan University covers an area of 455 1.84 mu, distributed in two campuses, with a public school building area of 81.4000 square meters, the total assets of teaching and research instruments and equipment is nearly 400 million yuan, and the library has more than 3.3 million books. It is the main node unit of China CERNET in Yunnan.