Tourists enjoy a circular-screen movie at a digital center inside the Mogao Grottoes, a world cultural heritage, in Dunhuang, northwest China's Gansu Province, April 15, 2017. Dunhuang received some 1.13 million tourists in the first quarter of this year with a total revenue of 1.1 billion yuan (about 160 million US dollars). (Xinhua/Fan Peikun)
