Visitors view Thang-ga painting tools and materials at the National Museum of China in Beijing, capital of China, Aug. 9, 2017. "The Face Is the Index of the Mind: Exhibition of Selected Thang-ga Artworks" was held at the National Museum of China on Wednesday. Over 100 works drawn by Thang-ga artists Shawu Tsering and Gendun Dargye were displayed here. (Xinhua/Tang Zhaoming)