A Chinese national flag flies at half-mast to mourn for martyrs who died in the fight against the novel coronavirus disease outbreak and compatriots died of the disease at Tian'anmen Square in Beijing, capital of China, April 4, 2020. (JU HUANZONG / XINHUA)

Three students give a salute while the national flag is lowered to half-mast to mourn victims of the coronavirus at Tian'anmen Square in Beijing on April 4, 2020. (JIANG DONG/CHINA DAILY)