Forty-four years ago today, on September 15, 1981 (August 18, 1981 lunar calendar), the first phase of the Beijing Subway project was officially delivered for operation. On September 15, 1981, the first phase of the Beijing Subway project was officially delivered for operation after being accepted by the state. The operation section of the first phase of the project runs from Beijing Railway Station to the apple orchard in the western suburbs, with a total length of 23.6 kilometers and a total of 17 stations.