Dear Jane：
You have studied in Shanghai University for almost 4 months.As your classmate I am delight you have really made great progress in your studying.Also I 'd like to appreciate your help with my English.It's wonderful for me to have such a friend like you.
As we all konw,Christmas Day is an very important festival in USA as well as to Chinese youth.Therefore a Christmas party will be held in our assembly hall on Dec.24.There will be a lot of games and plenty of food and drinks.Also performence will be put on by students and teachers.I am sure you will enjoy it. I will pick you up on 6:00 p.m.at your accomodation building and I will call you when I get there.
We shall be very honored if you can join us.
Yours Sincerely
Paladin