Chinese phrase
不用〜，谢谢 bú yòng 〜 xiè xiè
Meaning
no need to ___ thanks
When to use it
Politely says that an offered action is not needed. It gently declines help or an offer and includes thanks.
Example dialogue
你需要我帮你吗？ nǐ xū yào wǒ bāng nǐ ma
Do you need me to help you?
不用帮我，谢谢。 bú yòng bāng wǒ xiè xiè
No need to help me, thanks.