C134 Red rash only

"Alright, let me take a look." Yan Luoluo pulled over a chair and sat down beside Yan Qingfan, looking at the problems on the table. It was just junior high school knowledge, to her, it was simple and easy.

"This is very simple. Mommy will tell you about it."

Yan Luoluo pointed to the book on the table and was about to teach Yan Qingfan a lesson