长期以来,对云南边防地区有的称热带,有的称亚热带。云南边疆地区,包括8个专州,50多个县市(其中紧靠国境线的边沿县市20多个,自然村近3000个),面积有20多万平方公里,有长达4000公里的国境线。以北回归线作为温带热带的分界线,从总体上 For a long time, some of Yunnan’s border areas have called the tropics, while others have called the subtropics. Yunnan border region, including eight states, more than 50 counties (of which close to the border border cities and prefectures more than 20, nearly 3,000 villages), an area of ​​more than 200,000 square kilometers, with a national territory of up to 4,000 km line. With the Tropic of Cancer as the dividing line of temperate tropical, from the overall