Dear Snooby，　　首段：The time flies, we havent seen each other for a long time. I am writing to formally invite you to participate in Mr. Guo Jing and Huang Rongs wedding ceremony, which will be held at Beijing Grand Hotel from 8 to 10 p.m. on December 1, 2008.　　I am Li Ming, one of Yang Guos best friends. I, on behalf of Yang Guo and Xiao Longnv, am writing this letter for the purpose of inviting you to participate in Mr Yangs wedding ceremony with Xiao Longnv, which will be held at Shijiazhuang Railway Hotel from 8 to 10 p.m. on December 1, 2008.　　中间段:主题句+扩展句+结论句　　As one of our best friends, it is my pleasure to introduce the process of the ceremony. Firstly, the occasion will start at After that, at about , . At around ten, we will hold a small musical party, at which a band will perform some works by Xu Yuteng, one of the most popular singers.　　尾段：My thanks/hopes to you for your generous help/kind consideration on my requests are beyond words. I am looking forward to your favorable reply at your earliest convenience.