Whenever you see an opening for an attack, Rong appears to instantly draw away, before launching another series of strikes by starting off with the lunge. These are probably breaks in the technique designed to lure an enemy into overextending and also to create space should the user require it; their purpose is rather obvious to you. Even so, you can find no real opportunity to attack.
...
As he lunges yet again, you block the first strike. Again he moves his sword; again, in the same direction. You twist your sheathed sword, heavy in your hands, and yet growing familiar; metal clangs against metal as again you block him - and again, he moves, in an increasingly predictable way.
His breezy swordplay is nothing more than a string of moves chained together elegantly to respond to the way you block. The more predictable you are, the more predictable the Songfeng technique becomes. Of course, it took you the exchange of many moves to finally realize it, but it’s not too late yet.