Because it's convenient to store clothes like this.

The wardrobe in general school dormitory is divided into two sections, the lower section is 80cm x 60cm x 45cm, and the upper section is 80cm x 60cm x 140cm. I am from Tianjin Normal University, but the data provided is only an estimate, which is quite large, similar to the refrigerator size of 180L! Also, I tell you, a six-person room is as big as a four-person room, and the cabinets are as big. Unified standard, about 65*65* 170cm.