On the trip between Litang and Shangri-la the bus refuse to work for about 20 minutes. Meanwhile, the driver with help of some passengers moved petrol from one tank to another and did some other things in the inside of the bus to pump manually the petrol. There was no phone coverage in this part of the mountain, somewhere around 3500m, it was raining a bit and the tires sometimes were not adhering to the mud of the road. But we arrived at the end.