Villagers of the Baikuyao Nationality Eco-villages perform copper-drum dance in Huaili Village of Lihu Yao Autonomous Township of Nandan County in Hechi City, southwest China's Guangxi Zhuang autonomous region, March 7, 2012. The Baikuyao is a sepcial branch of the Yao ethnic group in southwest China with a population of about 30,000. The branch is recognized as the nationality branch preserving the most complete nationality culture by the United Nations Education, Scientific and Cultural Organization (UNESCO). The name Baikuyao means "wearing white pants." [Photo/Xinhua]