A postal staff member disinfects the warehouse for textbooks in Yinchuan, northwest China's Ningxia Hui Autonomous Region, Feb. 12, 2020. The Yichuan branch of China Post Group Co., Ltd. in coordination with local schools has launched a textbook delivery service in the city to make sure students receive textbooks of the new semester for the online education. (Xinhua/Feng Kaihua)
