Son doesn’t stay up late for study any more. Once he turned a deaf ear to my suggestion to keep early hours. He said almost all his classmates studied to midnight and he had got used to the habit too. As a result, many of them were inclined to get sleepy and even dozed off in class. Mr. Gong, the teacher in charge of son’s class, also opposed the tactics of retiring late in which he thought the loss by day outweighed the gain at night. Now son has realized the importance to listen to the teachers in class attentively and which can be assured only by sleeping well and eating well.