Dancers perform in Lanzhou, capital of northwest China's Gansu Province on Jan, 11, 2011. A grand three-act performance with the theme of presenting the essence of Chinese ancient dance and the romantic charm of the murals, music and poems in Dunhuang studies was seen in Lanzhou Tuesday. Dunhuang studies stem from the researching of frescoes of the Dunhuang Mogao Grottoes, a world heritage site in the northwestern part of Gansu Province. [Liang Qiang/Song Wen]