Dear sir/madam:

　　On , we will host an evening of celebration in honor of the retirement of , President of 。 You are cordially invited to attend the celebration at , , on from to p。m。

　　has been the President of since 。 During this period, expanded its business from to 。 Now it’s our opportunity to thank him for his years of exemplary leadership and wish him well for a happy retirement。 Please join us to say Good-bye to 。

　　See you on 。

　　Yours sincerely