People of the Yi ethnic group and tourists apply black color to each other’s faces during the celebration of a folk festival in Qiubei County, Southwest China’s Yunnan Province, July 18, 2017. As a tradition, people of the local Yi ethnic group turn each other's faces black to express their wishes for good health and happiness during the carnival, which dates back more than 1,000 years. (Photo: China News Service/Ren Dong)
