The Heshan Building, which stands firm in the middle of the old castle, can be said to be the iconic building of the Imperial City. It is a tower-like building. It was built by the Chen family to resist foreign enemies. It was built in the Ming Dynasty for five years and has a history of nearly 400 years. At that time, at the end of the Ming Dynasty, the world was in chaos, and the smoke was everywhere. Chens family invaded the riots and built the Heshan Building and the Tibetan Soldier Cave. Heshan Building is a hundred feet high. It is called the Baishan River Building. It is probably the tallest building in the Imperial City, and it is also a rare building in the Ming and Qing Dynasties. The building is divided into seven floors, with corridors connected to each other, which can accommodate more than a thousand people. There are windows on the third floor and above, and there are piers and towers on the top of the building. The ground floor is deep underground, and there are water wells. There are living facilities such as grinding and grinding, and there are dark passages leading to the outside of the city. After the completion of the Heshan Building, it was indeed besieged by the chaos. More than 800 people in the village and the Chen family took refuge in the building. In one month, they resisted the invasion of the chaos and protected the lives of more than a thousand people. The Heshan Building is made of stone. It lasted for more than 400 years and still stands in Xiangfu. It is a miracle.