Why does meimei tell her mother she doesnt want to play in the local tournament because they would have American rules?

Oh, dude, that's easy! Meimei probably doesn't want to play in the local tournament because they have American rules, and she's like, "Nah, I'm good." Maybe she's more into the traditional rules or just doesn't feel like dealing with the American ones. Who knows, man, it's all good either way.