How to politely refuse an invitation to play mahjong?

There are many ways to refuse an invitation to play mahjong, which can be divided into two situations. Because playing mahjong is also a social activity now. If you don't attend regularly, you may be pushed out by others.

If you have a good relationship with the other party, if you really have something to do, then you can say what I want to do now. If the other party hears it, it won't be forced. Or you can politely refuse others, for example, I am not free today, and then you can say that I am free tomorrow. Can I do it tomorrow?

If you don't want to have any contact with each other, just say I can't play mahjong. I don't like playing mahjong. Reject the other person directly, and the other person will understand what you mean.