Surname + 先生
The noun 先生 (xiānsheng) is a polite form of address meaning 'Mr.' or 'sir.' It is placed after a person's surname to show respect, much like 'Mr.' in English. For example, 王先生 means 'Mr. Wang.'
李先生,您的快递到了。
Lǐ xiānshēng, nín de kuàidì dào le.
Mr. Li, your delivery has arrived.
请问张先生在吗?
Qǐngwèn Zhāng xiānshēng zài ma?
Excuse me, is Mr. Zhang here?
先生,这边请坐。
Xiānshēng, zhè biān qǐng zuò.
Sir, please have a seat over here.
李先生,您的快递到了。
Lǐ xiānsheng, nín de kuàidì dào le.
Mr. Li, your express delivery has arrived.
请问张先生在吗?
Qǐngwèn Zhāng xiānsheng zài ma?
Excuse me, is Mr. Zhang here?
先生,这边请坐。
Xiānsheng, zhè biān qǐng zuò.
Sir, please have a seat over here.