Dear sirs 

We take great pleasure to invite you to our company's  anniversary ceremony.

 We will hold a cocktail party at 10.00 a.m-5:00 p.m., on Dece 31th, 2024, in Taian  We are looking forward to having your company in the party.

Enclosed you will find a formal invitation card.

We would appreciate it if you could confirm your availability at your earliest convenience.

Yours sincerely,