but you are too humble, teammate, and make me red face. HOHO. We can certainly discuss some badminton in the future.

若是同伴杀斜线，而对手回个直线前场

There is no set rules. But in doubles, in general, one should not do cross court shots too often because the development of the shot is too slow and the opponents have too much time to react.

In mixed doubles, it's a whole different story and you are supposed to attack the weakest link which is usually the female player except Gao Lin clearly.