Originally Posted by mcjava

Just 2 years ago, I found out the hard way that not all stations or HSR lines allow just a passport. I was so used to just a passport but in Changchun had to go to the ticket office and get a small receipt or a ticket otherwise they wouldn’t let me enter the station.

maybe now, 2 years later, all stations are OK with passport but be prepared for a small hassle outside of bigger cities and busy HSR lines.