Daheihe Stock Image

The upper tributary of the Yellow River is called Lechuan and Blackwater. The water source comes from the camel neck and the double parrot in the northeastern slope of the Manhan Mountain in the central Inner Mongolia Autonomous Region, with a total length of 236 kilometers. Because the amount of water in July to August is only half, the humus layer in the mountain area is washed away, which makes the river turbid and dark, so it is called the Dahei River.