乐生活Zhangjiakou Underground Great Wall (I) 2015/4
This is a 10-kilometer-long civil air defense tunnel from Dajinmen in the east to Wanquan County in the west, along the same direction as the Great Wall in the Ming Dynasty. In the 1970s, it was built under the situation of "deep excavation, extensive grain accumulation and no hegemony". Now some sections have been opened up as scenic spots. This group of pictures is the back hill of the jellyfish palace. The Great Wall is a military project, and so is the civil air defense corridor, so the local name for it is & quot; the underground Great Wall & quot; very aggressive, and often ambiguous.
