There are several specifications for hard-seat carriages of domestic trains. I have seen 1 12 and 1 18 full.

Hard-seat cars, the existing ones are as follows:

Hard seat type 22 has no train studio, no train office seats and no simple conductor seats, and the quota is 1 18. This example and the following examples include each variation of 22.

Type 22 workshop with train, no train office seats, and the number of people is 1 12.

Type 22 no-train broadcasting room with office seat for train conductor, which can accommodate 1 16 people.

Type 22 no-train broadcasting room is equipped with a simple conductor seat with a capacity of 1 16 persons.

25, 25G, 25K Same as above.

As far as I know, 25B employees have increased by 10.

Capacity of double-decker bus: 174 passengers (SYZ25B), 144 passengers (SYZ25K).

There are other situations, I'm not sure, please forgive me, in short, the number of models is very complicated.