Actors perform during Empress Wu Buddha-worship Ceremony held at Longmen Grottoes scenic spot in Luoyang, central China's Henan Province, Oct. 16, 2006. The ceremony is an imitation of the Buddha-worship ritual of Empress Wu Zetian, the only empress in Chinese history, according to records of the murals and statues of Longmen Grottoes.(Xinhua Photo) Photo Gallery >>>