Introduction to the Wolong Valley Grand Canyon: The Wolong Valley Grand Canyon has ravines and ravines, so there are many steep peaks, such as the dangerous Beifeng Gate, the tall bamboo pole top mountain, the majestic Porcelain Basin Mountain, and the steep Hell Nose Mountain. There is a local jingle that talks about the nose of the king of hell: "The nose of the king of hell, Iron Light Cliff, you can't climb up until you have a full meal." This shows that this mountain is high and dangerous, making it difficult to climb. According to the elderly, the depths of the Grand Canyon and Wangle'anzi were once a bandit's nest before liberation. After the bandits plundered and stolen goods, they drank, gambled and had fun there. The Beifeng Gate, the Nose of the King of Hell and other dangerous places were occupied by them. The safe place where the hostages are detained shows the important terrain, bad environment and few people.