When leaving the classroom, Zheng Fa sincerely thanked the elder: "Thank you for your guidance."
The elder waved his hand and said, "If you are willing to learn, I am willing to teach. If you have more questions, you are always welcome to come back and attend the class."
...
Xuanwei Realm.
Zheng Fa was learning again from the Sect Leader.
"Previously, you had not practiced the 'Divine Sky Thunder Control True Method', so teaching you the talisman formation skills was in vain; now that you have reached the Foundation Establishment, you can start learning the talisman formation skills."
Besides Yuan, there was nobody around.
Strictly speaking, even counting Yuan there was nobody around.
Master Yuan even set up a talisman formation, seemingly to prevent eavesdropping.
He then said to Zheng Fa, "But before I teach you the talisman formation skills, there's a rule I need to make clear."
"Yes," Zheng Fa responded, obediently listening.