How much does it cost to walk to Tibet?

I strongly don't recommend hiking in Tibet. I just want to travel to Tibet to broaden my eyes. I suggest going in and out by train or going in and out by plane. Lhasa and Shigatse have enough time in one week, and the cost is relatively low. If you want to travel, you are advised to sign up for a tour in Chengdu, take the 318 National Road by car and visit the beautiful scenery. It will take five thousand yuan in ten days. Students who want to go to Tibet are advised to organize a group to ride and take the 318 National Road. One is to test their physical strength and will. Then enjoy the beautiful scenery of western Sichuan and Tibet. One month's time, the cost is generally 6, to 1,. Sophomore students, just using the summer vacation, you can't walk from Chengdu to Lhasa at all, so there is not enough time. What are the problems to discuss?