Dear Mr. Smith,
(before opening) I hope this letter finds you well.
(opening 1 introduction) I'm Li Hua, chairman of the Students' Union from Chenguang High School, taking charge of your one-day tour in Tianjin. (opening 2 purpose) I'm writing to introduce the detailed arrangement as follows.
(body 1 morning plan) In the morning, we're going to have a discussion on the topics of school life, cultural difference and so on, aiming to exchange our mutual understanding. (body 2 lunch plan) At noon, we'll have some dumplings and noodles for lunch at our school's restaurant since it might be rare for you to taste the traditional Chinese food. (body 3 afternoon plan) In the afternoon, we plan to visit the Haihe River where we can enjoy the beautiful scenery.
(closing thanks & expectation) I appreciated it if you could reply with your comments.
Yours sincerely,
Li Hua