C172 Huo Chengzhou Is More Handsome than Mu Haoyan

Qiao An fell silent. "Friend."

The teacher smiled and gossiped, "Couple friends?"

Qiao An said,... "Teacher, why are you also gossiping?"

"Haha." The teacher laughed for a while. "The 21 days rule is a way to cultivate a good habit through the correct repeated practice of 21 days. However, when it comes to treating insomnia, you still need to supervise the patient's rest