问答题

Suppose you are a student of Fudan University. You went to Chengdu last month and unfortunately lost your bag there with your student card, identification card and 2000 yuan in it. When you got back to Shanghai, you received a parcel in which all your lost things are contained. From rite address of the writer, you know he is Li Wen, a teacher of Sichuan University. Now you want to write a letter of commendation to Li Wen. You should write approximately 100 words. Do not sign your own name at the end of your letter. Use "Du Ping" instead. You do not need to write the address.