Chinese phrase
在〜楼 zài 〜 lóu
Meaning
be on the ___ floor
When to use it
States which floor a place is on. It is commonly used to give a floor number when describing a location inside a building.
Example dialogue
请问图书馆在几楼？ qǐng wèn tú shū guǎn zài jǐ lóu
Excuse me, what floor is the library on?
图书馆在4楼。 tú shū guǎn zài 4 lóu
The library is on the 4th floor.