If Liu chengfeng could really be taken in by Xia ruofei, his Qi Level 7 cultivation alone would be much higher than Li Yifu 's.
Among the people around Xia ruofei, his direct disciple Tang Haoran was still young and had a low cultivation. Ling Qingxue and Song Wei were only at the third level of the Qi refining realm. Even if they were about to break through to the fourth level, they would still be far behind Liu chengfeng.
Furthermore, Liu chengfeng was very familiar with the world of cultivation. He was also a disciple of the fallen leaves sect. This would be very helpful for Xia ruofei to get in touch with the world of cultivation in the future.
If he could completely subdue Liu chengfeng, it would be equivalent to planting a spy in the falling leaves sect. At a critical moment, it might play an unexpected role.
Of course, the premise of all this was that he could completely subdue Liu chengfeng. At the moment, there was no other way.