Introduction to Qinglonggou: Its real name is Qinlonggou. It is said that the nine sons of the Dragon King of the Holy Water Well of Dagui Temple in northwest China were making trouble here. Lu Dongbin, one of the Eight Immortals, knew about it and fought fiercely with him, and finally captured nine evil dragons alive, hence the name Qinlonggou. Later, it was renamed Qinglonggou because the green sandalwood, fir trees and Huashan pines in the ravine were densely covered with sunlight and remained green all year round. The total length of the valley is 20 kilometers, and 7.5 kilometers have been developed. There are Buyun Bridge, Shuangfei Platform, Dragon King Bookshelf, Qinglong Inkstone, Double Dragon Chessboard and other attractions.