Since the inauguration of the fast train, slow trains are used by lower income Chinese: students, farmers, migrant workers...
It is very interesting to compare train station passengers: fast train station and older slow train station passengers.
Hopefully slow train can operate for many years and in sufficient number so that lower income Chinese can still travel throughout China. You need mobility if you want to find a job in China.
- You have three different sleeping couches: the lowest couch is larger and more expensive. You should avoid the highest couch: very narrow and not easy to climb up.
- You also have a second and a first class. Sometimes you have three different classes: one class without any couches. You will sit all night long. Two classes with couches.