There is a small table between the two lower berths. Passengers can put small goods such as boxed food, bottler water, fruit on it. Under the table, there is more space to put your small trunk.
On the Tibet train, there is also no problem to bring a big trunk. You can put it under the lower sleeper or in the luggage closet above the door. The space under the lower sleeper is 190cm length, about 30cm height and 75cm width, while the luggage closet is 50cm width and 40cm height. For convenience, you can put your luggage underneath the lower soft sleeper berth.
Soft Sleeper Compartment