Great wall at Huangya Pass
Around 120 kilometers north of Tianjin, there is a 42-kilometer section of Great Wdl rarely visited by overseas tourists. Construction of the Huang-yaguan Great Wall started in 557 under the Northern Qi Dynasty. It was rebuilt during the Sui and Ming dynasties, with 14 beacon towers and 52 guard towers , connecting Malanguan Pass in the east and Pinggu Jiangjun-guan Pass in the west.

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