The seats of traditional trains are fixed and designed back to back, because ordinary trains may face one side or the other. If the seats all face in one direction, they may all follow or all fall backwards. Moreover, in the past, in order to save costs, the seats of hard-seat cars were fixed, unlike the seats of EMUs that could not rotate in the same direction. After all, most long-distance buses are hard-seat cars, and soft-seat cars are only used for individual short-distance intercity trains. The soft seat of EMU is more comfortable than the hard seat of ordinary bus, and the seat can be adjusted. After all, a penny is worth a penny, and comfort is definitely more expensive. Moreover, after a large number of EMUs are put into operation, the number of ordinary passenger cars is decreasing. Long-distance ordinary passenger cars generally increase the proportion of sleeper cars and reduce the proportion of hard-seat cars, but the seats of air-conditioned hard-seat cars are still more expensive than in the past.

The cushion under the seat needs a new one. Too old.