A visitor looks at tools and mineral dyestuff used in Thangka making at Niangben's Thangka Art exhibition in Beijing, capital of China, April 16, 2014. The exhibition of 65 Thangkas created by Niangben, a master of Chinese Arts and Crafts and representative heir of the national intangible cultural heritage, kicked off at the National Museum of China Wednesday. [Xinhua/Jin Liangkuai]