From Chengdu to Tibet, there are two choices: fly to Bayi or take the Sichuan-Tibet line by train.
If you fly, it may be difficult to adapt to the climate in Tibet at once. If you take the train, it will take a long time and there will be a process of slow acceptance.
Fly to Bayi 1580 yuan (of course, discounted air tickets will be cheaper than this), 1 hour for 20 minutes. Isn't it very cheap to take the Sichuan-Tibet line by car? It takes three days, but it's bad luck to hit a mudslide or something.
I don't know if you have seen the movie "Turn the Mountain", which is about a young man from Taiwan Province Province who flew to Lijiang and rode from Lijiang to Tibet. In addition, I recommend you to read a book, Samsara written by Pu Sha. Personally, I think this book is very good.
You can also fly from Xi 'an to Tibet. The key depends on your personal physical fitness.
The main attractions in Tibet are:
Major tourist attractions in Tibet
Lhasa
Potala Palace Jokhang Temple Bajiao Street Luobulinka Museum drepung monastery Sera Temple Tiancangtai Tibetan Ancient Temple Xiami Temple Ma Jia Palace
Nyingchi
Basongcuo Giant Berlin Lulang Linhaibi Sun God Mountain Serra Mountain Kadinggou Yarlung Zangbo River Grand Canyon Nanjiabawa Peak South Igalonla Snow Mountain
Shigatse
Tashilhunpo Temple Mount Qomolangma Shan Zong Site of Baiju Temple in Mafeng, Xixia State Pala Manor Geden Qukuo Forest Temple Gadong Temple God Tooth Cave
South of the mountain
Yongbula Kangyang Zhuoyongcuo Sanye Temple Lamla Cuochangzhu Temple Tombs of Tibetan Kings Qingpu Practice Site Democratic Forest Temple Diaolou Site Gerola Snow Mountain.
Changdu
Basuga Rock Paintings at Karuo Site in Ranwu Lake Ding Qingzhe Luosi Gama Temple Qiang Bahrain Temple Qin Sheng Langzha Valley Bush Mountain Dora Mountain
Naqu
Site of Namco Elephant Kingdom in Shuanghu No Man's Land, such as Skull Wall, Meimu Cave in Hoh Xil, Shuanghu Dangrang Yongcuo Shenzha Nature Reserve, etc.
Ali
Guge Kingdom Site Tolin Temple Kejia Temple Gangrenbo Qima Panyongcuo Zhada Tulina Mu Na Nifeng Mailonggou Site
Best travel time
July to September is the best time for outdoor tourism in Tibet every year. Tibet has strong radiation, abundant sunshine and low temperature. The temperature decreases with the elevation and latitude. Wet and dry, rainy night. Winter here is dry, cold and windy. Summer is cool and rainy, with more hail; The four seasons are unknown. The average temperature in the warmest month in most areas is below 15℃, and the average temperature in June and July is lower than that in the eastern plain of the same latitude 15-20℃. When you travel to Tibet, you must consider the seasonal factors. The climate in the alpine region is long in winter and short in summer, and the four seasons are distinct only in some parts of southeastern Tibet. For areas with convenient transportation, such as Lhasa, Shigatse, Linzhi and Shannan, you can basically travel all year round. In areas with inconvenient transportation such as Changdu, it is better to travel in May, June and September. 1, Ali area is the best in spring and autumn, the southern line is not easy to walk in summer, and it is basically not easy after snowing in winter; 2. Linzhi area is cold in spring, with the most beautiful scenery in autumn and the best climate at this time; 3. There are planes to Changdu City in Changdu area, but the road conditions in rainy season are extremely poor; Except the Qinghai-Tibet Highway in northern Tibet, there is basically no way to go in the lake area in summer. It's windy and dusty in spring, and it's best to go in autumn, but the time is short. As long as there is no snowstorm, it is quite convenient to go in winter.