Li Yanyan demonstrates how to put on mask to volunteers at Mawangdui section of People's Hospital of Hunan Province in Changsha, central China's Hunan Province, Feb. 6, 2020. The hospital on Thursday organized training courses for nurses who volunteered to join the fight against the novel coronavirus. The training includes psychological counseling, standard procedures of putting on and taking off protective suit and knowledge on epidemic prevention and control of the novel coronavirus. (Xinhua/Chen Zeguo)