What is the format for writing an invitation letter?

An invitation letter generally consists of a title, a salutation, a body, a conclusion and a signature.

(1) title. The first line is centered on "Invitation Letter".

(2) address. Write the name of the invited organization or the name of the invitee in the top space, and put a colon after the address.

(3) Body. Write the time, place, content and related matters of the event. If the invitee is allowed to speak at the meeting, it should be indicated in the invitation letter so that it can be prepared.

(4) Conclusion. Write some polite words.

(5) Signature. Name of the organization or name of the individual. Write the year, month and day of sending the letter at the bottom right of the signature.