Tourists arrive at the digital display center of Mogao Grottoes in Dunhuang, northwest China's Gansu Province, Aug. 1, 2014. The Mogao Grottoes, a UNESCO world heritage with more than 2,000 colored statues and 45,000 square meters of murals, represents the great achievements of Buddhist art from the 4th to the 14th century. A digital display center of Mogao Grottoes officially opened to public on Friday, with more than 2,700 bookings through www.mgk.org.cn as the first batch of tourists. [Xinhua/Sun Zhijun]