This is Huangju Waiyuan, where the emperor of Japan lives. The stone pier outside the double bridge was transported from Fujian Province, China. Why is that stone field? It turned out that the emperor was afraid that the Ninjas who were assassinated would not make a noise at night, so he put a stone array on it. The emperor was also afraid of accidents. It is built outside the palace in a broad square, the square is planted with very beautiful pines and cypresses, the road is paved with gravel!