Ducks swim in a stream in Heshun ancient town, Tengchong, southwest China's Yunnan Province, Feb. 16, 2017. Heshun town has a history of 600 years. (Xinhua/Li Yan)
Ducks swim in a stream in Heshun ancient town, Tengchong, southwest China's Yunnan Province, Feb. 16, 2017. Heshun town has a history of 600 years. (Xinhua/Li Yan)