来源@视觉中国

Shanhai Pass, known in Chinese as Shanhaiguan, is one of the major passes in the Great Wall of China. The words "First Pass Under Heaven" are engraved above one of the gates, and so the site is also known by that name. It is located in Shanhaiguan District, Qinhuangdao, Hebei province.

来源@视觉中国

来源@视觉中国

In 1961, the pass became a National Cultural Site of China. It is a popular tourist destination given its situation at the eastern end of the main line of the Ming Dynasty Great Wall. The location where the wall meets the Bohai Sea is nicknamed "Old Dragon's Head" (老龙头). The pass lies nearly 300 kilometres (190 mi) east of Beijing and is linked via the Jingshen Expressway that runs northeastward to Shenyang.

来源@视觉中国

来源@视觉中国

Throughout Chinese history, the pass served as a frontline defense against ethnic groups from Manchuria, including the Khitan, Jurchen and the Manchus.

Source: en.wikipedia.org