"Please take a seat" is the Engpsh equivalent of "请坐" in Chinese.
It is a popte phrase commonly used when inviting someone to sit down, usually in a formal setting such as a meeting or a dinner. It is a direct translation of the Chinese phrase and is used in a similar manner.
Example in Engpsh:
Can I offer you a seat?
Please, take a seat and make yourself comfortable.
Example in Chinese:
能为您提供一个座位吗？
请，坐下来，让自己舒适一点。