Introduction to Hanshan Lake Power Station: The tail water of the power station is connected to the Beigan channel building. The water from the canal flows eastward and can irrigate 180,000 acres of farmland, accounting for about 62% of the county's cultivated land area. There are more than 620 large and small buildings along the entire line, making it the longest main canal in Zhejiang Province. The "Hongqi Aqueduct" connecting the east and west irrigation areas is 824 meters long, 28 meters high, and has a main span of 11 meters. It is known as the "Tianshui Flying Crossing" and is the largest multi-span mortar stone arch aqueduct in the country.