塞外山城──张家口张家口市位于河北省西北部，处于蒙古高原与华北平原过渡带，三面环山，京包铁路从南部通过，放射形公路通联内蒙、山西、北京，历史上为兵家必争之地，素有“京都锁钥”之称。张家口地处三省通衢，是闻名遇尔的北方商埠，城市道路四通八达，商业网点１... The Great Wall beyond the Great Wall ─ ─ Zhangjiakou Zhangjiakou City is located in the northwest of Hebei Province, in the plateau of Mongolia and the North China Plain transition zone, surrounded by mountains, Beijing-Beijing railway from the south through the radial road communications Inner Mongolia, Shanxi, Beijing, the history of the military for the fight To the ground, known as “Kyoto key lock,” said. Zhangjiakou is located in three provinces Tongqu, is well-known North Seoul’s commercial port, city road extending in all directions, commercial outlets 1 ...