C217 Acuteness(part iii)
If Changmen Niepo wanted to turn defense into offense, it was indeed not that easy, and it was obvious that the opponent would not so easily give Changmen Niepo the opportunity to turn defense into offense. However, for Changmen Niepo, it didn't matter if it was easy, or if the other party did not give him the chance to do so, or for some other reason.
In short