Introduction to Jiuwan River: Jiuwan River is located 20 kilometers south of the upper reaches of the Yangtze River from the Three Gorges Dam. It is one of the few tributary grand canyons in the Three Gorges of the Yangtze River. The total length of the stream is 46 kilometers. It is the most dangerous in the ancient waterway of the Three Gorges of the Yangtze River. of flight segments. Jiuwan River is the first river in the Three Gorges.