Is it not safe to hide in the back?

It's not very safe, the rear Tibet is underdeveloped, the tourism service is imperfect and there are many hidden dangers.

Lhasa and Shannan are called "pre-Tibet", Shigatse is called "post-Tibet" and the whole northern Tibetan plateau is called "Ali".

The tunnel between Qianzang and Houzang is Nimu Canyon in the middle reaches of Yajiang River. The whole post-Tibet region has complex terrain, which can be divided into five parts from north to south: Gangdise-Nyainqentanglha Mountain Range, Yarlung Zangbo River Valley, Lagu Gangri Mountain Range, Pengqu River Basin and Himalayas.