Introduction to the Yuzui Water Diversion Dike: The Yuzui Water Diversion Dike, also known as "Fishui", is the water diversion project of Dujiangyan. It is named after its shape like a fish's mouth. It stands high in the center of the Minjiang River and includes the Baizhang Dike. , Chacha, Jingangdi and other facilities that cooperate with each other. Its main function is to divide the turbulent Minjiang River into two internal and external rivers. The western one is called the Outer River, commonly known as the "Jinma River", which is the main flow of the Minjiang River and is mainly used for flood drainage; the eastern one along the foot of the mountain is called the Inner River, which is an artificial water diversion channel and is mainly used for flood drainage. irrigation.