C921 Origin of cultivation technique

"Alright, alright, stop being so noisy."

Zhang Zitao laughed as he separated the two of them, "Yan Er, you seem to have something to do?

"Ah, yes!" "I haven't written the materials yet!"

Bai Yan suddenly remembered after he reminded her.

As a result, Bai Yan hurriedly returned to his seat and began writing. Seeing that her sister was no longer messing with him