Introduction to Jiutian Palace: Located on the upper floor of Jiutian Cave, there is a large stalactite shaped like an ancient bell on the east side of the hall. It is about 30 meters high and 5-6 meters in diameter. It is surrounded by small crystal clear milky white stone pillars. It buzzes. In the hall, there are also landscapes such as Optimus Prime, the largest stone pillar discovered in the cave, the Golden Whip of the Prodigy, and the Baoguang of the Skylight.