到了上个世纪50年代初，为了解放百万农奴，保卫祖国边疆，进军西藏的人民解放军在极为艰苦的条件下，在高寒缺氧的世界屋脊上移山填壑，筑路架桥，修通了被称为“连接北京和拉萨的金桥”的川藏公路，把五星红旗插上了地球之巅，终结了千年川藏茶马古道的历史。
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