What do you mean there are no seats on the high-speed rail?
Seatless tickets on the high-speed rail are standing tickets, that is, there are no seats to sit on. The railway department sells seatless tickets, which is also a way to let more passengers go home. Passengers can buy it voluntarily.
Seatless tickets for high-speed rail are generally arranged in second-class carriages, and the fare is the same as that of second-class seats. When there is no room in the carriage, you can stand at the junction of the aisle and the carriage and have a rest in the dining car. You can also bring your own small stool and sit in a place that does not hinder others from walking.
There are people getting on and off at every station of the high-speed rail, and there will be empty seats, so you can sit down temporarily. However, if someone gets on the bus at the next stop, he must make way for the ticket holder.