C214 Secret Art of Linglan (2)

"Thank you for your guidance!"

Li Yan had already memorized the entire contents of the book. As for whether he could understand the logic behind it, it would depend on his talent.

"There is a record in the 'Spirit Triple Secret Manual', when a doctor cultivates, they need to gather the Yin and Yang Qi, and when yang qi is harvested from males, the Yin Qi is harvested from females