1(dialect) I or me
2(dialect) (in a coaxing or familiar way) you
3also pr. zá men
4we or us (including both the speaker and the person(s) spoken to)
Examples
lǎo shī老师shuō说：“zán men咱们xiàn zài现在jiù就chū fā出发。”
老师说：“咱们现在就出发。”
The teacher said: "Let's set off right now."
他一到，咱们就走了吧。
Let's leave as soon as he arrives.
咱们一起去图书馆学习，你看怎么样？
How about studying together in the library?