Wang Rubin paints masks of Nuo Opera in Enshi City of Tujia-Miao Autonomous Prefecture of Enshi, central China's Hubei Province, Feb. 6, 2018. Nuo Opera, performed with distinguishing masks, is an ancient folk drama which is still popular in many Chinese provinces along the Yangtze River. Wang Rubin has devoted to mask-making of Nuo Opera for over 20 years. (Xinhua/Yang Shunpi)