Photo taken on March 16, 2014 shows the Nuo Opera masks made by folk artisan Wang Rubin at his workshop in Enshi Tujia and Miao autonomous prefecture, Central China's Hubei province. Masks are a distinguishing feature of the Nuo Opera, an ancient folk drama which is still popular in many Chinese provinces along the Yangtze River. For more than two decades, Wang Rubin has been devoted to preserving and promoting mask-making techniques of the Enshi Nuo Opera, now a listed national intangible cultural heritage in China.[Photo/Xinhua]