中国是一个幅员辽阔、高山峻岭绵延不绝的国家．又是一个几千年战事频繁的国家，所以在地形险要之处和交通要冲之地早就修关设卡了。我国建关之早、关隘之多、名关之胜都为世界之最。雄关险隘既是交通枢纽，又是兵家必争之地，亦常为风景名胜所在。千百年以来，雄关险隘不仅壮? China is a country with a vast territory and an endless mountain range. It is also a country that has been fighting for thousands of years. Therefore, it has long been a time to repair the card in areas where the terrain is difficult and the traffic hub. As early as the establishment of our country, as many pass, the victory of the name of customs are the most in the world. Pass off risk is not only traffic hub, but also the battleground of the military, often for scenic spots. Thousands of years ago, the male risk pass not only strong?