C39

The mother and son didn't have any lunch, so the afternoon was long and hard to bear. Only half the time had passed when Zhe Zhe was already on the verge of going berserk again. Qian Ning took the textbook and placed it on the table. She looked at him and said, "Zhe Zhe, how about this? We'll each take a step back. You only need to give us one lesson today before we go out to eat