Introduction to the Jiulongdong Grand Canyon: The Jiulongdong Grand Canyon is located in the middle reaches of the Jinjiang River in Tongren City. It is also called the Jinjiang Grand Canyon in eastern Guizhou. It was formed when the Jinjiang River cuts through the Liulong Mountains, a branch of the Wuling Mountains. The total length of the canyon is about 35 kilometers. , the general depth is 400~700 meters, and the deepest is 968 meters. The entire canyon area is complicated with cliffs, steep slopes, and caves, including the majestic Liulongshan cave group.