As well as tag questions with ma, tag questions can also be formed using 不 (bù). This is done with a positive negative question.
Structure
Verb+不+Verb
This can then be attached to the end of a sentence to form a tag question. Tag questions seek confirmation or acceptance of what has been said. In English, "right?" and "OK?" are often used as tag questions.
Examples
Wǒmen hē chá , hǎo bu hǎo ?
我们 喝 茶, 好不好 ?
我们 喝 茶, 好不好 ?
Let's have tea, OK?