Questions & Answers about qǐng xiān qǔhào.
Yes. In this sentence, 请 is the polite marker please.
It is commonly used before a verb phrase to make an instruction sound polite:
- 请坐。 = Please sit.
- 请等一下。 = Please wait a moment.
- 请先取号。 = Please take a number first.
In signs and service situations, 请 often introduces a polite instruction rather than a request in the English conversational sense.
先 means first or before doing something else.
In Chinese, 先 usually comes before the verb it modifies:
- 先看 = look first
- 先吃饭 = eat first
- 先取号 = take a number first
So 请先取号 literally feels like:
- please + first + take-a-number
The idea is: before speaking to staff, before waiting for service, or before doing the next step, you should take a queue number.