For the first incident, Fang Zhengzhi managed to convince one using his logic, explaining the importance of "self-knowledge" and "humility". He also enlightened them as to how a sage should have viewed the two elements.
For the second incident, Fang Zhengzhi was able to identify his "flaw" in just one glance, and fill him with his newfound wisdom. The participant was able to better understand how arduous the path would be, which was just like "sailing against the current; either you keep forging ahead or you keep falling behind."
All these were already very surprising.
But this time round...
One who was trapped in the bottleneck for 5 years, at just one simple advice from "Fang Zhengzhi", suddenly broke through to the Rebirth State.
How overwhelming?
It could easily be just coincidence for the first and second incidents.
However...