More than two thousand years of water conservancy project - Dujiangyan came to Sichuan, travel to Chengdu, Dujiangyan is a must go, this more than two thousand years of water conservancy projects have been playing a role in flood control, making the Chengdu Plain become a flood The "Tianfu Country" of the people and the fertile land has reached more than 30 counties and cities with an area of nearly 10 million mu. It is the world's oldest, the oldest, the only remaining, still in use, and characterized by damless water diversion. Water conservancy project. It is a godly existence, and it must be worshipped with gratitude!