作文内容，你的美国笔友Jack想来深圳学习汉语，请给他写一封信告诉他如何学好汉语。

Hello,Jack!
How are you?
Would you like to come Shenzhen to study Chinese? Could you want to study Chinese well, you can often speak Chinese with you friends. And you can ask your teacher want to help and so on.

Hi,Jack,I'm happy that you can come to Shengzhen to learn Chinese language.How to learn Chinese language well ? First,I think you must love Chinese.Then,you should work hard and spend time on Chinese language.You shuould believe yourself you can learn Chinses language well .I believe that you will learn Chinese language well too.
Best wishes
Your friend