Doctor Hu Xiaoling (L) with her colleague delivers medicines to a household in Nanchang, east China's Jiangxi Province, Feb. 26, 2020. Wechat can track users' daily step counts, and its step rankings are used to compare users' step counts to those of their friends. Since the outbreak of the novel coronavirus (COVID-19), many people have been staying home for prevention of COVID-19. However, people including volunteers, medical workers, public officials, community workers and railway staff etc., whose step counts always ranked top during the battle against COVID-19, have been sticking to their posts and making efforts on the epidemic prevention. (Xinhua/Peng Zhaozhi)