If it had been a normal situation, they wouldn't have sent a Cave Master and their disciples to engage in a doctrinal debate. This time, it was entirely because of Cao Zhen that it happened.
Wu Jianzi said Cao Zhen was his Sword Dao Pathfinder.
Such words would not be spoken carelessly.
In other words, Cao Zhen's Sword Dao was more profound than Wu Jianzi's. So why didn't Cao Zhen speak out during the previous sword discussions?
Why didn't he defeat the Cave Masters of the Thousand Caves Door?
He must have known that Wu Jianzi would return, and even conspired with Wu Jianzi in advance, intending to use him to strike at their Thousand Caves Door.
What a schemer, Cao Zhen truly is a master schemer!
This time, with only Cao Zhen fighting his way through their Thousand Caves Door and engaging in countless debates, they didn't win even once!
Then there was Wu Jianzi, crushing their Cave Masters in debate.