Mianyang to Lhasa

I'm from Mianyang, and I just went to Lhasa last month. Generally, I can't buy a direct train ticket, but I have been bought by a tour group. If you want to take the train, you can choose to change trains. In Xi 'an or Xining West, I change trains in Xi 'an, which can also relieve the fatigue of long distance. If you choose the plane, Mianyang has now opened a flight to Lhasa, and the price is around 1500. You should make a reservation in advance, which will be cheaper. As for the level of opposition, it depends on one's physical fitness. Flying is not necessarily a high objection, and taking the train is not necessarily a high objection. The altitude of Lhasa is not very high, only more than 2000 meters. Adjust your mentality and don't do strenuous exercise. Basically there will be no problem. Take a rest in Lhasa for a few days, get used to it and go to Everest base camp.