Shanhai Pass, Fortified pass at the eastern end of the Ming Great Wall in Shanhaiguan, Qinhuangdao, China

Shanhai Pass is a fortified gate at the eastern end of the Ming Great Wall in Shanhaiguan, Hebei. Its east gate, Zhenyuan Tower, is a two-story structure with a red facade, dark tiled hip roof, and overhanging eaves. Above the central arch, a dark plaque bears the white characters 天下第一关. The gatehouse sits atop a massive gray stone wall that extends left and right.

The present pass was built in 1381, when Ming general Xu Da repaired older Yongping and Jieling passes and founded Shanhaiguan on the site of Qianmin Town. In the late 16th century Qi Jiguang added forts and a military city, and in 1644 Wu Sangui opened the gate to the Qing. It was taken by the Northeast Field Army on 27 November 1948.

The plaque above the archway reads "天下第一關" (First Pass Under Heaven), a name the pass earned as the easternmost gate of the Ming Great Wall. The current board is a 1920 copy by Yang Baoqing; the Qing-era original, recopied in 1879 by Wang Zhi after the lettering faded, hangs inside the tower.

Visitors can reach the site using buses 25 or 33 from Sidaoqiao station, with the entrance gate clearly accessible and well signposted. Plan at least two hours to explore the fortification and walk around the surrounding grounds.

The pass sits where the Yan Mountains meet the Bohai Sea, a 7.5 km flat corridor called the Jieshi Road. The plaque above the arch reads "天下第一關" (First Pass Under Heaven); the original was replaced in 1879 by a copy by the scholar Wang Zhi, and the old plaque was moved inside the gatehouse.