Seeing Yue Xin staring, Yi Chengxuan asked, "Are you interested? You should have learned it before, right?"
Yue Xin recalled her foolish behavior of deliberately not studying hard in order not to get first place. She nodded. "Yes, I learned it, but I didn't comprehend it at that time."
Yi Chengxuan was silent for a moment before taking out two other books from the side. One was a combat manual of a certain country's army, and the other was a platoon strategy of a certain country's army.
Yi Chengxuan had his usual smile on his face. "Then when you're tired from studying military knowledge, I can teach you a few physics questions to adjust."
Yue Xin was puzzled.
