How about a hard seat on the train?

A hard seat is like sitting on a wooden stool, and a soft seat is like sitting on a sofa;

2. Two people are squeezed in the hard seat and three people are squeezed in the soft seat, and two people are spacious on both sides;

3. Hard seats can be overcrowded, people are standing in the carriage, soft seats are not overcrowded, and how many seats are sold;

4. The hard seat is served by one conductor 100 passengers, and the soft seat is served by two or three conductors serving 70 or 80 passengers;

5. The hard seat is for passengers to turn on the water themselves, and the soft seat is for the conductor to send the water to the seat;

6. You can sit on a hard seat, show your chest and back, and show your muscles. Sit on the soft seat, so you will be driven to the hard seat (hehe, joke ...)