65 years ago today, on February 24, 1960 (January 28, 1960 lunar calendar), the barrage dam of the Qingtongxia Water Conservancy Junction Project was closed and intercepted. On February 24, 1960, the barrage dam of the Qingtongxia Water Conservancy Junction Project was closed and intercepted. The project began on August 26, 1958. This is a water conservancy project for comprehensive utilization of power generation, irrigation, and regulation of the amount of water in the Yellow River. After the dam is closed, the Yellow River can be controlled in Ningxia, Inner Mongolia and other regions, and an irrigation network covering an area of 10 million mu in the Yellow River plain and an irrigation network in mountainous areas can be formed in Ningxia.