People of the Dong ethnic group take part in an ancestor-worshipping ritual during the Sama Festival in Liping County, southwest China's Guizhou Province, Feb. 15, 2016. Sama was the name of a heroine in ancient maternal society of Dong people and the Sama Festival, held to commemorate the ancestor, also has the history for a thousand years. (Xinhua/Liu Xu)

People of the Dong ethnic group take part in an ancestor-worshipping ritual during the Sama Festival in Liping County, southwest China's Guizhou Province, Feb. 15, 2016. Sama was the name of a heroine in ancient maternal society of Dong people and the Sama Festival, held to commemorate the ancestor, also has the history for a thousand years. (Xinhua/Liu Xu)

People of the Dong ethnic group take part in an ancestor-worshipping ritual during the Sama Festival in Liping County, southwest China's Guizhou Province, Feb. 15, 2016. Sama was the name of a heroine in ancient maternal society of Dong people and the Sama Festival, held to commemorate the ancestor, also has the history for a thousand years. (Xinhua/Liu Xu)

People of the Dong ethnic group take part in an ancestor-worshipping ritual during the Sama Festival in Liping County, southwest China's Guizhou Province, Feb. 15, 2016. Sama was the name of a heroine in ancient maternal society of Dong people and the Sama Festival, held to commemorate the ancestor, also has the history for a thousand years. (Xinhua/Liu Xu)