参考范文：

　　Dear Alex，

　　I'm glad to learn from your letter that you're going to pay a visit to Beijing recently. I'd like to be your guide and give my suggestions for your two­day trip here.

　　On the morning of the first day, I suggest we climb the Great Wall, which is famous all over the world. After lunch, we can enjoy the Bird's Nest and the Water Cubic where the 2008 Olympics was held.

　　Next day, I recommend we go sightseeing in the Peking University and Tsinghua University, the two most noted universities in China. We'd better visit the Forbidden City in the afternoon, so you can appreciate the splendid royal palace.

　　I'd be happy if my suggestions are helpful to you. And I'm looking forward to your coming.

　　Yours sincerely，

　　Li Hua