On the other hand, when practicing according to "True Meridian" and "Divine True Meridian," there seemed to be some effect, at least the Ling sisters' cultivation levels had increased, and under Li Fan's personal guidance to correct many of their cultivation mistakes, they had gained much insight. However, Li Fan's benefits were not great, after all, in terms of Dual Cultivation refinement of the quintessence of heaven and earth, it was still inferior to directly utilizing "Returning to Collection."
Clearly, these two techniques did not seem as intricate as those he had devised, so where was the problem...