Jiang Shan (L), the supervising technician of radiology department of the Second Xiangya Hospital of Central South University, says goodbye to his wife before setting out for Hubei Province in Changsha, central China's Hunan Province, Feb. 4, 2020. A medical team comprised of 42 members from the Second Xiangya Hospital of Central South University set off on Tuesday to aid the coronavirus control efforts in Hubei. [Photo/Xinhua]

Medical members of the Second Xiangya Hospital of Central South University gather before setting out for Hubei Province in Changsha, central China's Hunan Province, Feb. 4, 2020. A medical team comprised of 42 members from the Second Xiangya Hospital of Central South University set off on Tuesday to aid the coronavirus control efforts in Hubei. [Photo/Xinhua]

Zhang Lei (R), a doctor of nephrology department of the Second Xiangya Hospital of Central South University, hugs his wife before setting out for Hubei Province in Changsha, central China's Hunan Province, Feb. 4, 2020. A medical team comprised of 42 members from the Second Xiangya Hospital of Central South University set off on Tuesday to aid the coronavirus control efforts in Hubei. [Photo/Xinhua]

Medical care team members wave goodbye before setting off for central China's Hubei Province, in Nanchang, east China's Jiangxi Province, Feb. 4, 2020. A medical care team comprised of 101 members set off for Hubei from Nanchang to combat the novel coronavirus pneumonia on Tuesday. [Photo/Xinhua]

A medical care team member (R) hugs a colleague before setting off for central China's Hubei Province, in Nanchang, east China's Jiangxi Province, Feb. 4, 2020. A medical care team comprised of 101 members set off for Hubei from Nanchang to combat the novel coronavirus pneumonia on Tuesday. [Photo/Xinhua]

Medical care team members queue to board a plane setting off for central China's Hubei Province, in Nanchang, east China's Jiangxi Province, Feb. 4, 2020. A medical care team comprised of 101 members set off for Hubei from Nanchang to combat the novel coronavirus pneumonia on Tuesday. [Photo/Xinhua]

A medical care team member (R) hugs her husband before setting off for central China's Hubei Province, in Nanchang, east China's Jiangxi Province, Feb. 4, 2020. A medical care team comprised of 101 members set off for Hubei from Nanchang to combat the novel coronavirus pneumonia on Tuesday. [Photo/Xinhua]

Medical workers gather at Changshui International Airport in Kunming, capital of southwest China's Yunnan Province, Feb. 4, 2020. The second batch of medical teams of 102 members from Yunnan set off on Tuesday to aid the coronavirus control efforts in Hubei. [Photo/Xinhua]

Medical workers wave goodbye at Changshui International Airport in Kunming, capital of southwest China's Yunnan Province, Feb. 4, 2020. The second batch of medical teams of 102 members from Yunnan set off on Tuesday to aid the coronavirus control efforts in Hubei. [Photo/Xinhua]

Medical worker Dong Wen has her long hair cut in order to better wear protective suit in Kunming, capital of southwest China's Yunnan Province, Feb. 4, 2020. The second batch of medical teams of 102 members from Yunnan set off on Tuesday to aid the coronavirus control efforts in Hubei. [Photo/Xinhua]

Medical workers pose for a group photo before setting out for Hubei Province at Xining Caojiapu International Airport in Xining, northwest China's Qinghai Province, Feb. 4, 2020. The second batch of 100 medical members from 25 hospitals in Xining and Haidong set off on Tuesday to aid the coronavirus control efforts in Hubei. [Photo/Xinhua]

Medical workers pose for a group photo before setting out for Hubei Province at Xining Caojiapu International Airport in Xining, northwest China's Qinghai Province, Feb. 4, 2020. The second batch of 100 medical members from 25 hospitals in Xining and Haidong set off on Tuesday to aid the coronavirus control efforts in Hubei. [Photo/Xinhua]