Lu Chen had given Su Hanyan ample time to mentally prepare himself. After the Cultivators' Conference, he could have directly taken action against Su Hanyan, but he hadn't. Instead, he let Su Hanyan meet Li Qianrou and Wu Junwan.
Through Wu Junwan and Li Qianrou, Su Hanyan came to understand Lu Chen even better. Of course, she still felt that Lu Chen's kindness towards his wives was all an act.
The purpose was to make them willing to become the people who would shield him from tribulations in the future, or perhaps sacrifices for certain great ways.
At this moment, Li Qianrou seemed to think of something and then said to Su Hanyan, "Honored Master, I have a Cultivation Technique here that you might find useful tonight."
Su Hanyan asked curiously, "What Cultivation Technique?"
Li Qianrou replied, "Mysterious Female Technique."