Introduction to the beacon tower: It was built with bricks and reinforced on the original site of the beacon tower when Fan Zhongyan was guarding Yanzhou. Although the beacon tower is not on the top of the mountain, it has a wide view. From the platform, you can have a panoramic view of the three rivers in the east, west and south of Yan'an City. Once the beacon fire is lit, everyone in Sanchuan's army and civilians will know it, which can serve as an alarm and fend off the enemy.