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
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