Chinese phrase
没事儿，我不介意！ méi shìr wǒ bú jiè yì
Meaning
It's okay. I don't mind!
When to use it
This phrase says that a small problem is not a concern. It is a friendly reply to an apology for a minor mistake, showing that no annoyance is felt.
Example dialogue
对不起，我把你的橡皮碰掉了。 duì bù qǐ wǒ bǎ nǐ de xiàng pí pèng diào le
Sorry, I knocked your eraser off.
没事儿，我不介意！ méi shìr wǒ bú jiè yì
It's okay, I don't mind!