The most economical way is to take the airport bus to the destination, that is, get off at the opposite campus of Lanzhou University, 30 yuan, which is an hour's drive. Take the school bus from Lanzhou University to Yuzhong Campus in the general campus. I got it for 7 yuan in my senior year (2009). I don't know if it has gone up, not much. I can take the exam if other schools pay for it. You can go this way if you are not in a hurry.