Introduction to Tieshan Fort: Tieshan Fort is located 50 miles northwest of Youyu County and 10 miles west of the border wall. It was built in the 38th year of Jiajing in the Ming Dynasty (1559) and covered with bricks in the second year of Wanli (1574). , Week 1.4, Gaolian's female wall was 3 feet 5 feet tall. There is a connection outside the gate, which is inscribed "Guarantee the Suppression of Lu"; there is a stone tablet outside the pass, which is inscribed "Iron Barrier and Golden Soup".
Nowadays, the walls of Tieshan Fort are still relatively complete, with four corner platforms and wall towers standing. The remains of the east gate are obvious, but the brick surface is peeled off from the wall, and there are traces of artificial damage in some places.