Dancers dressed in ancient costumes perform during a sacrifice ceremony at "the Temple of Fu Xi" in Tianshui, northwest China's Gansu Province, June 22, 2013. More than 20,000 Chinese from China and abroad attended a sacrifice ceremony held here Saturday to pay tribute to Fu Xi, a culture hero who is believed to be the inventor of writing, fishing and hunting. Fu Xi is regarded as one of the ancestors of the Chinese nation. (Xinhua/Chen Bin)