The blue sky, white clouds and grassland of Kaidu River in Hejing County, Bayingolin Mongolian Autonomous Prefecture, northwest China’s Xinjiang, constitute a beautiful ecological picture. Kaidu River is one of the major rivers in Xinjiang, and is known as "nine turns and eighteen bends".

Kaidu River has a total length of about 610 kilometers, a drainage area of 22,000 square kilometers, and an average annual runoff of 3.362 billion cubic meters. It finally flows into Bosten Lake, the largest inland freshwater lake in China, moistening 22,000 square kilometers of arable land and nourishing 427,360 people. (Photo by Tian Guojian)