can i book train ticket online and receive on station when i arrive?

of course, you can book the ticket online. Here is my advice and I used to book the ticket online in this website. It works well.
https://www.travelchinaguide.com/china-trains/
As I know, if you want to get your ticket in advance, the operator of the website will post the ticket to you. So you need provide your address to them.