Introduction to the city gate tower: The city gate tower is more than 40 meters high and 70 to 80 meters wide from east to west. The city wall is made of stones and is more than 20 meters thick. Above the three city gates, there are tall walls, green tiles and flying rafts, and Stanley pillars with painted eaves, which are particularly spectacular. The center of the tower is inlaid with three large golden characters "Yin Wuwei" inscribed by Jiang Zemin, and the two golden characters "Liangzhou" are carved on the door opening in the middle. The east side of the tower is in the same vein as a street in the Ming and Qing Dynasties, retaining the same architectural style.