A medical staff of Xiaotangshan Hospital disinfects a ward after the hospital cleared all COVID-19 cases in Beijing, capital of China, April 28, 2020. Xiaotangshan Hospital, which was previously used to quarantine SARS patients in Beijing, cleared all COVID-19 cases Tuesday and is scheduled to cease operation Wednesday. The hospital, located in the city's northern suburb, was renovated and put into operation on March 16 for the screening and treatment of imported mild and common confirmed COVID-19 cases, suspected cases and those who need to be tested. (Xinhua/Peng Ziyang)