参考范文：

Dear Sir/Madam,

　　 Greetings from China!

　　 I’m Li Hua, a student in Sichuan. I’ve been a panda lover since I was a child. About three years ago I was delighted to learn that Baiyun gave birth to her daughter Sulin and I’ve been watching her grow on your website,. Now she’s going to be three. I’d like to wish her a happy birthday and to express my thanks to you for your hard work, because of which Sulin and her parents are living a happy and healthy life in the US.

　　 By the way, could I have a photo of Sulin taken on her third birthday? Thank you very much in advance.

　　

　　 Yours truly,

　　 Li Hua