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As its water is deep and dark, it is called "Naqu" by Tibetans, which means the black river. The Nujiang River is divided into three sections. The upper reaches, from the source to the Jiayu Bridge, take up 50% of the total drainage area of the trunk. In the middle reaches, the Gaoligong and Biluo mountains guard the roaring Nujiang River as it forces its way along, forming the majestic Nujiang River Gorge, the second largest gorge in the world. The lower reaches travel from the Lu River to the Andaman Sea.

The Nujiang River is rich in water resources as well as mineral resources such as copper, iron, lead, tin, coal, hydrargyrum, crystal, sulfur, graphite and mica, etc.

