Huang Mao (R), head of the Chinese medical delegation to Venezuela, speaks during an online lecture on knowledge about the COVID-19 prevention and control in Caracas, Venezuela, April 4, 2020. (Photo by Marcos Salgado/Xinhua)

Chinese medical delegation to Venezuela attend an online lecture on knowledge about the COVID-19 prevention and control in Caracas, Venezuela, April 4, 2020. (Photo by Marcos Salgado/Xinhua)

Chinese medical delegation to Venezuela attend an online lecture on knowledge about the COVID-19 prevention and control in Caracas, Venezuela, April 4, 2020. (Photo by Marcos Salgado/Xinhua)