The transformation of Blood Pills allows for about a 30 percent conversion of Po Li.
Bai Xiao's strength attribute is 89 points, and a 30 percent conversion to his physical constitution attribute could drastically raise his already high 95 points to an exaggerated 122 points! This is far more powerful than when he first broke through the Blood Pill stage!
At that time, Bai Xiao's first attempt only raised his physical constitution attribute to 101 points. This is because as his strength and physical constitution attributes continued to grow, the limit of Po Li conversion also naturally rose along with them.