Letter of Advice

Dear friend 0*,
　 On behalf of the Students’ Union,I would like to extend our heartfelt welcome to all of the overseas students from all over the world in our university.
　　In order to make your trip comfortable and meaningful,I would like to give some suggestions to you!1* .Firstly,winter in CQ is cold and wet,you would better 2* had better bring some warm clothes.Secondly,you would 2* live in the apartment which built for you.Thirdly,you will 2/3* live with some other foreign students.Forth,you can2/3* eat in the canteen in our school.Fifth,extracurricular activities are quite interesting in our campus,it they provide ample opportunity for you to make friends.
　　More details will be written in the file behind attached? named students' must knows.Again,I wish you have a good time here.
　　　　 Sincerely yours, 4*
　　　　 Li Ming

Thanks for your kind help,I appreciate it.

0* depends on what the question asks you but 'Dear friend' is not usual in English. If there is really no name you could maybe use 'Dear new student', or else invent a name.

1* I would prefer "make some suggestions" without to you.

2* The usual structures to give advice are:

You should, you ought to, you had better, it is advisable to, we recommend you, why don't you..?, how about..?, and lots more. You haven't used any of them here where they would be very appropriate, considering the title is a letter of advice.

3* I'm not sure if these are really pieces of advice of regulations.

4* 'Yours sincerely' is more standard in British/ European English. I don't know what the situation is with American style.

Good attention to letter structure, nicely constructed sentences with good use of style and well corrected. But without 'advice' expressions it unfortunately is missing an important part of the aim of the letter.