Performers dance in a ceremony during the 5th ball throwing carnival celebrated by people from China, Laos and Vietnam in Jiangcheng Hani and Yi Autonomous County of Pu'er City, southwest China's Yunnan Province, Dec. 30, 2017. (Xinhua/Yang Zongyou)

Performers dance in a ceremony during the 5th ball throwing carnival celebrated by people from China, Laos and Vietnam in Jiangcheng Hani and Yi Autonomous County of Pu'er City, southwest China's Yunnan Province, Dec. 30, 2017. (Xinhua/Yang Zongyou)

Performers dance in a ceremony during the 5th ball throwing carnival celebrated by people from China, Laos and Vietnam in Jiangcheng Hani and Yi Autonomous County of Pu'er City, southwest China's Yunnan Province, Dec. 30, 2017. (Xinhua/Yang Zongyou)

Performers dance in a ceremony during the 5th ball throwing carnival celebrated by people from China, Laos and Vietnam in Jiangcheng Hani and Yi Autonomous County of Pu'er City, southwest China's Yunnan Province, Dec. 30, 2017. (Xinhua/Yang Zongyou)

Performers dance in a ceremony during the 5th ball throwing carnival celebrated by people from China, Laos and Vietnam in Jiangcheng Hani and Yi Autonomous County of Pu'er City, southwest China's Yunnan Province, Dec. 30, 2017. (Xinhua/Yang Zongyou)