Medical team members cheer for themselves at the Guiyang Longdongbao International Airport in Guiyang, southwest China's Guizhou Province, Feb. 16, 2020. A medical team comprised of 137 medical workers from Guizhou left for Wuhan on Sunday to aid the novel coronavirus control efforts there. (Photos: Xinhua)

Medical team members swear an oath at the Guiyang Longdongbao International Airport in Guiyang, southwest China's Guizhou Province, Feb. 16, 2020. A medical team comprised of 137 medical workers from Guizhou left for Wuhan on Sunday to aid the novel coronavirus control efforts there.

Medical team members cheer for themselves at the Guiyang Longdongbao International Airport in Guiyang, southwest China's Guizhou Province, Feb. 16, 2020. A medical team comprised of 137 medical workers from Guizhou left for Wuhan on Sunday to aid the novel coronavirus control efforts there.

Medical team members line up before set out at the Guiyang Longdongbao International Airport in Guiyang, southwest China's Guizhou Province, Feb. 16, 2020. A medical team comprised of 137 medical workers from Guizhou left for Wuhan on Sunday to aid the novel coronavirus control efforts there.