求一篇英语作文，假设你是李华，你的英国朋友Tim上个月来上海学习。今年寒假你将去上海参加全国中学生

Dear Tim,
We have not seen each other for a very long time. I heard that you came to Shanghai for study. How is your study now? I really want to hear from you. Now, I'm writing this email to tell you a piece of good news. I will go to Shanghai this winter holiday. I am going for English speech competition. I am searching for and collecting information these days, but I face many challenges. I have difficulties with the use of languague. Could you give me some ideas to solve this problem? I will also visit your school and see you after my competition. I can't wait to see you. Please write to me as soon as possible.
Yours
Li Hua