Under the careful and meticulous guidance of Madam Yan, after a day of interaction and learning, Li Fan had thoroughly mastered the various marvelous uses of the "Book of Meridians," achieving insight and understanding. In turn, he reciprocated by imparting the secrets of "The Book of Meridians" to the Yan sisters.
Of course, it was legitimate cultivation practice, and not to be misconstrued otherwise.
However, Yan Liuyun admitted her comprehension was subpar. Although Li Fan provided careful guidance and explanations, she still felt inadequate in grasping "The Book of Meridians" after just one day and night, suggesting that she might need another three to five days of teaching to delve deeper and gain understanding.