Dear Zhang Ming
How's it going.
I am very glad to know that you will enter a senior high school.Congratulations!But the life in senior high school is not easy.Here are some tips for you.First you should make a study plan,it is good for you to study well.Second you should do some sports everyday.Good health bases on sports exercise.At last,hope you can make a great progress in your study and live a happy healthy life
Yours
Li Hua
追答貌似词数不够,在最后healthy life后面加个 Good luck my cousin.