Medical team members swear an oath before setting off at the Third Xiangya Hospital of Central South University in Changsha, central China's Hunan Province, Feb. 8, 2020. Medical workers of the third batch from the Second Xiangya Hospital of Central South University and the first batch from the Third Xiangya Hospital of Central South University set off for Wuhan on Saturday, the Chinese Lantern Festival, to aid the novel coronavirus control efforts there. (Xinhua/Chen Zeguo)