Historically, only one ramp was connected to the outside world. There was no road to access before. There were two ramps in the direction of Xidang and Ninon in the direction of Yubeng. The ramp in the west was more convenient. It was necessary to hike or ride a raft. It was 12 kilometers uphill and 6 kilometers downhill. It was over 3,700 meters. The road has been opened (one-way 260 yuan/person), but the Panshan Highway is more dangerous, and the price is too expensive, it is not recommended to take the car to enter the rain collapse