[解析]
Dear Mr. Smith,
I am Li Hua, chairman of the Student Union, from Xi'an Middle School. I am delighted to learn that you are coming to visit our school on February 4th. I am writing to tell you what we have arranged for you.【高分句型一】 (自我介绍,表明书信目的)
In the morning, there will be a forum in the school auditorium, where visitors and students from our school communicate with each other, talking about school life and cultural differences.【高分句型二】 At noon, you are invited to have lunch in our school cafeteria with students from our school. You can taste dumplings, noodles and other Chinese foods. In the afternoon, the students in our school will show you around the Bell Tower and the Drum Tower, located in the heart of the city. (介绍活动安排并简要说明理由)
How do you like the arrangements? I hope you'll have a nice time in Xi'an.(征求对方意见)
Yours sincerely,
Li Hua