It's best not to wear cheongsam, because basically everyone wears cheongsam in the guzheng competition now, which looks like a cheongsam catwalk and has no special features.

If it's modern, you'd better find a small dress, which will look good on a little girl.

If it is classical music, you can customize a suit, not too expensive, and you need it later, because there will be some small performances after the game.