Recently, the spring irrigation work in the North has been carried out in an all-round way. Qingtongxia City, located in Ningxia Plain, passes through the Jiuqu Yellow River. Since the Qin and Han Dynasties, Qingtongxia has successively excavated nine ancient irrigation canals, such as Qin canal, Han canal and Tanglai canal, which is known as the "head of the nine canals" of the Yellow River and Ningxia. Nowadays, under a series of modern scientific water control and management measures such as remote control, intelligent water level monitoring, flow monitoring and water regulation, the ancient irrigation canal of gravity irrigation is rejuvenated, providing a strong guarantee for efficient and water-saving spring irrigation. (Qingtongxia water control project) (qianba sluice in Qingtongxia City) (located in tangzhengzha, Qingtongxia City) (this is the scene model of ancient channel construction photographed at Ningxia Water Conservancy Museum in Qingtongxia City on March 22.) (on March 22, tourists visited Ningxia Water Conservancy Museum in Qingtongxia City.) (on March 22, at the canal head Management Office of Ningxia water resources department located in Qingtongxia, the staff adjusted and monitored the water supply of the sluice through remote control.) (Xinhua News Agency)