Actors perform in an imitation of the scenes, in which Empress Wu Zetian, a powerful empress in Chinese history, cruises the Luohe River, at Longmen Grottoes scenic spot in Luoyang, central China's Henan Province, Sept. 25, 2010. The performance was a part of the activity held here to mark the 10th anniversary of Longmen Grottoes' declaration as the world heritage. [Chen Xiaodong/Xinhua]