Introduction to the beacon tower: The beacon tower was built in the seventh year of Zhengtong in the Ming Dynasty, that is, 1442. It is one of the outer road towers on the side wall of the Great Wall in the Ming Dynasty. The beacon tower is in the shape of a square bucket, with a base of 9 meters and a top of 8 meters. Green bricks with white ash mouth are 40.2 cm long, 17.2 cm wide and 10.2 cm thick. The south platform is 8.49 meters high, the west platform is 6 meters high, and the north platform is 6.57 meters high. The east side has been broken into a slope shape.