西藏地处世界上最高的地区,三面环绕着巍峨山脉。在这广阔而又荒寂的区域,生活着顽强的藏族游牧部落,他们的居住区平均海拔超过了4000米。藏族居住区可分为五个主要区域,分别是藏西(阿里)、后藏(藏)、前藏(卫地)、藏东(康区)和东北藏区(安多)。这些地区相距遥远,交通闭塞,并不容易构成政治和文化的统一体,商贸和战争决定了这个地区和周边各个地区之间的外在关系。藏西主要牵涉到与 Tibet is located in the tallest region in the world, surrounded by majestic mountains on three sides. In this vast and lonely area, there are tenacious Tibetan nomadic tribes living on average more than 4,000 meters above sea level. The Tibetan residential area can be divided into five major areas, namely, Tibet (Alishan), Houzang (Tibet), Qianzang (Weidi), Tibetan (Kham) and Northeast Tibetan (Ando). These areas are far apart and the traffic is blocked. It is not easy to form a political and cultural unity. Business and war determine the external relations between the region and the surrounding areas. Tibet is mainly involved with the West