Combo photo taken respectively on Feb. 12, Feb. 19 and Feb. 21, 2020 from top to bottom shows different construction phases of a hospital complex building used for infectious disease prevention in Yinchuan, northwest China's Ningxia Hui Autonomous Region. Designated for the novel coronavirus prevention and control, the complex building, an expansion project of the Fourth People's Hospital of Ningxia, was finished in 15 days and delivered on Friday. (Xinhua/Wang Peng)