Li Xiaoyan (R), a medical worker, says goodbye to her colleague Gao Qian before Gao setting out for Wuhan of Hubei Province in Xi'an, northwest China's Shaanxi Province, on Feb. 2, 2020. Shaanxi sent its 2nd batch of medical workers to aid Hubei Province in fighting the novel coronavirus on Sunday. (Xinhua/Li Yibo)