Write a letter of congratulations in 150-200 words according to the following situation.Write your letter on the answer sheet.
Your friend Mark wrote you a letter saying he was admitted to a high school in Beijing as an exchange student and asking for suggestions on how to make the best of his time in China. Write a letter to congratulate him on the admission, and make suggestions on adapting to the new environment and experiencing Chinese culture, Please sign your name as Li Fei.