Ducks rest on the Qihe River in Hebi, Central China’s Henan province, Dec 5, 2017. [Photo/Xinhua]

Photo taken on Dec 5, 2017 shows the Qihe River State Wetland Park in Hebi, Central China’s Henan province.[Photo/Xinhua]

Photo taken on Dec. 5, 2017 shows a view of the Qihe River in Hebi, Central China’s Henan province.[Photo/Xinhua]

Ruddy Shelducks rest on the Qihe River in Hebi, Central China’s Henan province, Dec. 5, 2017. [Photo/Xinhua]

Photo taken on Dec. 5, 2017 shows the Qihe River State Wetland Park in Hebi, Central China’s Henan province. [Photo/Xinhua]