What is the cheapest way to get from Jinan to Lanzhou (feasible, within 36 hours)?

I took the train and stood beside the station ticket. I bought a station ticket to Xi a few years ago. The air conditioner was turned on quickly, and it took 19 hours. ..........

Only 140. It seems to be just a few packets of instant noodles and a few golden gong sausages. .....

Bring your own newspaper and sleep on the floor. If you can hold on, you can try.