Congratulations on your passing all the exams. I am delighted you have really made great progress in your two years of studying in China. All you have gained is the result of your hard work. We are proud of you and we all appreciate your help with our English We'll always remember the wonderful time we spent together.
It's pity that you have to go back soon! So a farewell party for you will be held in Room 302 in the Sun Club this Saturday evening. Could you come by 6:00 p.m.? We'll have dinner together. By the way，you may take Bus No. 332 in front of your hotel and it will take you directly to the club.
I wish you success and fulfillment in the years ahead!