Do you mean these stops along the trains from Lanzhou and Beijing? Well, I think you could get the details by this website's train search tool at https://www.travelchinaguide.com/china-trains/

Thank you Mr. Tom for your replying but I was mean in my question is How many kilometers between Beijing and lanzhou?

Hi, the expressway distance between them is about 1,600kilometers~

It is two hours by plane (two regular flights from Beijing to Lanzhou daily from taking off from Beijing Captial Airport). There are also many express train services (with onditioning) plying between Beijing and Lanzhou daily. The distance by train is about 17 to 27 horus depending on which train you will be taking.