The Great Wall - Jiumenkou, located at the junction of Xintaizi Village, Lijiabao Township, Suizhong County, Huludao City, Liaoning Province and Jiumenkou Village, Zhucaoying Town, Haigang District, Qinhuangdao City, Hebei Province, was first built in the Northern Qi Dynasty and expanded in the 14th year of Hongwu in the Ming Dynasty (1381). It belongs to the eastern section of the Jizhen Great Wall in the Ming Dynasty. It is an important pass connecting Shanhaiguan and Zuizishan sections of the Great Wall. The geographical situation is dangerous and it is known as the "First Pass in Jingdong". The Great Wall - Jiumenkou starts from the northern cliff of Laoniu Mountain in the south and ends at the No. 20 enemy tower in the north, with a total length of 1,980 meters, running from north to south. Its layout includes the Great Wall, the river-crossing bridge, a stone pass city, beacon towers on both sides of the wall, horse-blocking ditches (moats), horse-blocking walls, sentry towers, camps, etc. There are nine enemy towers from No. 12 to No. 20 in the north of Laoniu Mountain, a wall platform, two side platforms at both ends of the bridge, eight shuttle-shaped piers on the bridge body, and two siege cities on both sides of the bridge. These building structures form a complete military defense system that can attack and retreat, and has a depth of several miles. A large number of cultural relics such as iron cannons, stone cannons, stone mines, blue-and-white porcelain bowls, large jars, and stone tablets were unearthed.
On November 20, 1996, the Great Wall-Jiumenkou was announced by the State Council of the People's Republic of China as the fourth batch of national key cultural relics protection units. In September 2002, the Great Wall including Jiumenkou was listed as a "World Cultural Heritage Site" by the United Nations World Heritage Committee.