Meaning of kāi mén:
kāi mén
开门
Verb
to open a door (lit. and fig.); to open for business
Tā měi zǎoshang dōu hěn zǎo qù kāimén.
他每早上都很早去开门。
He goes to open the door early every morning.
Chāoshì míng zǎo bā diǎn kāimén.
超市明早八点开门。
The supermarket opens at eight tomorrow morning.