Visitors watch the replicas of murals of Dunhuang at an exhibition in Jinan, capital of east China's Shandong Province, Nov. 20, 2015. An art exhibition, featuring more than 50 replicas of Dunhuang murals, opened on Friday. Mogao Grottoes, a UNESCO World Heritage Site in Dunhuang of northwest China's Gansu Province, are famous for a huge collection of Buddhist artwork, boasting more than 2,000 colored sculptures and 45,000 square meters of murals in 735 caves carved along a cliff. (Xinhua/Zhu Zheng)