In 605 AD, Yang Di dug the Grand Canal and the Economic Canal to connect the Yellow River and Huaihe River. In the same year, the Guhan ditch was dredged to connect the Huaihe River and the Yangtze River, forming the second half. Three years later, with the influx of more than one million migrant workers from Hebei, Yongji Canal was dug in Zhuo Jun County (now south of Beijing), forming the upper part. Refers to the Yi River, Luohe River, Chanhe River and Jianhe River in the urban area, as well as Zhongzhou Canal, large open channel and railway flood control canal in the urban area.
The meaning of the three channels:
1 and Sanqu generally refer to Sanqu built in Han Dynasty. Water conservancy project. Dujiangyan in Warring States and Three Rivers in Han Dynasty.
2. It also refers to Sanqu Town, which belongs to Jingyang County, Xianyang City, Shaanxi Province, and is located in the central and eastern part of the county. It is adjacent to Tong Yuan Town, Gaoling District, Xi City in the east, Jinggan Street and Yongle Town in the south, Yunyang Town and Jang Jin in the west, and Chengguan in Sanyuan County in the north.
As of June 2020, Sanqu Town has 17 administrative villages. As of 20 18, the registered population of Sanqu Town is 46,759. 20 1 1 year, the total agricultural output value of Sanqu Town reached 220 million yuan.