Number/Demonstrative + 位 + Noun
The classifier 位 (wèi) is a polite measure word used to count people, conveying respect toward the person being referred to. It is more formal than the general classifier 个 and is commonly used in professional, ceremonial, or courteous contexts. For example, 这位老师 (this teacher) sounds more respectful than 这个老师.
今天来了三位客人,请大家欢迎。
Jīntiān lái le sān wèi kèrén, qǐng dàjiā huānyíng.
Three guests have come today; please welcome them.
这位是我们的新同事,大家认识一下。
Zhè wèi shì wǒmen de xīn tóngshì, dàjiā rènshi yíxià.
This is our new colleague; let's all get to know each other.
请问几位?我帮你们安排座位。
Qǐngwèn jǐ wèi? Wǒ bāng nǐmen ānpái zuòwèi.
How many in your party? I'll arrange seats for you.