I bought a hard sleeper ticket from Changzhi to Hankou on January 24th because it is the upper berth and I want to change berths. Can I change it?

If you bought a beautiful bunk in the lower berth, who would exchange it with you? <br/>Regular way: If there are remaining tickets in the lower berth, you can change the ticket to the lower berth. <br/>But there is no free lower berth during the Spring Festival travel season. Happy to have a ticket. <br/>If it helps you, please click Accept

You can't change it, and you can't choose your seat when you buy tickets online.