Can I buy a student ticket sleeper from Zhanjiang to Wuchang? Please give me a definite answer.

Of course not. The student ID card indicates which section is which section. Occasionally, there will be an accommodating railway station, but generally you are allowed to buy tickets at the station between Guigang and Wuchang, and you are not allowed to buy tickets beyond this section in Zhanjiang. Besides, by the way, can students buy a half-price sleeper now? I'm not allowed to study unless you get on the bus to make up the ticket.