王猛心里咯噔一下，知道肯定是被发现了。他立马转过身，脸上笑成了一朵花，嘿嘿道：“是啊，刚收拾完，准备回去。”说话间，他顺手把教案往旁边一放，示意对方进来。

门口站着的 telecom is a short, plump middle-aged man, wearing a simple tweed suit, looking to be in his early fifties. He has a round face and a gentle expression, holding a coffee cup in his hand. "I'm Teacher Li, head of the history department," he said, nodding slightly. "I came to check if the classroom was okay after the afternoon class. Unexpectedly, I met you here, Wang Meng?"

王猛's eyes lit up, "Li Teacher! Long time no see, you're still as vigorous as ever! What are you doing here?" He walked over and greeted enthusiastically. "I just finished cleaning up this classroom for the high school history class. The principal asked me to take it over temporarily."

Li Teacher sipped his coffee happily, "Well, that's good. The school is short of teachers this semester, and you are capable. I'm very satisfied with your work. By the way, have you familiarized yourself with the teaching materials? This year's history teaching plan is quite different, so you need to prepare carefully."