The first time I went to Pingliang for research and interview, my initial impression was that the transportation was extremely inconvenient. There is no airport, no high-speed rail, and it takes four hours to drive here after landing at Lanzhou Airport. In fact, in the past, Pingliang has always been an important node city on the land Silk Road, known as "the first city of Chang'an in the west", and now it is also the intersection of Shaanxi, Gansu and Ningbo provinces (autonomous regions). Howe