1、邀請參加晚會，
2、說明舉辦晚會的原因，
3、將安排哪些活動。
范文：
Dear Snoopy,
I am greatly honored to formally invite you toparticipate in Mr. Guo Jing’s wedding ceremonywith Ms. Huang Rong to be held at Beijing GrandHotel from 8 to 10 p.m. on April 1, 2007.
As you are a close friend of us, we would very much like you to attend the celebration andshare our joy. The occasion will start at seven o’clock in the evening, with the showing of theirwedding ceremony. This will be followed by a dinner party. At around ten, we will hold a smallmusical soiree, at which a band will perform some works by Bach and Strauss.
If you do not have any prior appointment on April 1, we look forward to the pleasure ofyour company.
Yours sincerely,
Li Ming
