群山逶迤地形多变的云南省，山区半山区占全省国土面积的２／３以上。重重高山，道道山箐，成为阻碍云南经济发展的天然屏障。边疆地区各族群众依靠人背马驮，维系着与大山外部的联系和交流。新中国成立后，云南的公路建设突飞猛进，公路盘亘彩云间构成云岭大地一道别具特色的 Mountainous and rugged terrain changeable in Yunnan Province, the mountainous Mid-Levels accounted for more than 2/3 of the province’s land area. Heavy mountains, roundabouts, become a natural barrier to economic development in Yunnan. The people of all nationalities in the frontier areas rely on their backs and laps to maintain their contact and exchange with the outside of the mountain. After the founding of New China, Yunnan’s highway construction by leaps and bounds, the road between clouds form a distinctive Yunling earth