要點如下：1. 對其表示關心和同情。2. 對其表示安慰并提供幫助。3. 表達愿望和祝福。
注意：1. 詞數150左右;2. 可以適當增加細節，以使行文連貫。
【 possible version】
Dear Wang Pin,Knowing that you are delayed in Wuhan, I am really getting upset about it. So are our classmates. I'm writing to convey our concern to you on behalf of the class.Words came that Wuhan was in bad condition due to the spreading novel Coronavirus. However, dear friend, there's no sense worrying about it too much. You are supposed to stay optimistic. After all, you merely have a bit of fever. College Entrance Examination is around the corner, you know. So precious is time that we can't afford to waste it. As scheduled, our online class will be held on Feb. 8. All of the classmates have access to the Internet courses wherever you are. It is convenient for us to study, isn't it?Is there anything I can do for you? Feel free to contact me. I sincerely expect that you can make a quick recovery and return to normal.