A Thangka painter paints a portrait at a workshop in Lhasa, capital of Southwest China's Tibet autonomous region, July 20, 2016. 20 giant Thangka paintings depicting 500 Arhats (people who have attained nirvana), each stretching 3.1m in height and 3m in width, were created under the guidance of master Nima, a Tibetan Thangka artist and visiting scholar at Tibet University. [Photo/Xinhua]