Renowned Chinese respiratory specialist Zhong Nanshan (R) attends an oath-taking ceremony via video connections for two new probationary Party members in Wuhan to take the oath of joining the Communist Party of China, in Guangzhou, south China's Guangdong Province, March 2, 2020. (Xinhua/Deng Hua)

Renowned Chinese respiratory specialist Zhong Nanshan (C, front) attends an oath-taking ceremony via video connections for two new probationary Party members in Wuhan to take the oath of joining the Communist Party of China, in Guangzhou, south China's Guangdong Province, March 2, 2020. (Xinhua/Deng Hua)

Renowned Chinese respiratory specialist Zhong Nanshan (L) attends an oath-taking ceremony via video connections for two new probationary Party members in Wuhan to take the oath of joining the Communist Party of China, in Guangzhou, south China's Guangdong Province, March 2, 2020. (Xinhua/Deng Hua)

Renowned Chinese respiratory specialist Zhong Nanshan attends an oath-taking ceremony via video connections for two new probationary Party members in Wuhan to take the oath of joining the Communist Party of China, in Guangzhou, south China's Guangdong Province, March 2, 2020. (Xinhua/Deng Hua)

Renowned Chinese respiratory specialist Zhong Nanshan attends an oath-taking ceremony via video connections for two new probationary Party members in Wuhan to take the oath of joining the Communist Party of China, in Guangzhou, south China's Guangdong Province, March 2, 2020. (Xinhua/Deng Hua)