Chen Quanfu makes a mask of Nuo Opera in the Xiangdong District of Pingxiang, east China's Jiangxi Province, Dec. 28, 2017. Mask is an important element of Nuo Opera, a national intangible cultural heritage. Chen Quanfu and Peng Guolong are the inheritors of Xiangdong Mask of Nuo Opera. The craft calls for a great deal of time as well as mastery. Chen can carve 400 types of masks and Peng creates many new models on the basis of traditional skills. (Xinhua/Peng Zhaozhi)