The Ela Mountain route is a must-pass passage from Sichuan to East Tibet. The average altitude is more than 3,900 meters, and the mountain road is rugged and steep. Drivers who often run National Road 317 are familiar with it, and they must be especially careful when crossing Ela Mountain. Snow here generally dare not run this road around. Especially the big car, the road is very dangerous. If you want to cross the mountain, it takes an hour and a half to get a car, two hours to get a car, and it takes a lot longer to encounter rain and snow.