门开着，请进。

Mén kāizhe, qǐng jìn.

The door is open, please come in.

你是小王吗？请进。

Nǐ shì Xiǎo Wáng ma? Qǐng jìn.

Are you Xiao Wang? Please come in.

门没锁，请进吧。

Mén méi suǒ, qǐng jìn ba.

The door is not locked, please come in.