Title: Write the words "invitation" or "invitation card" on the cover. If it is an electronic invitation, you can use the words "Please attend".

Title: Write the name of the invitee on the second line of the invitation, such as "Dear Sir/Madam [XXXXX]" or "Dear Professor/Teacher [XXXXX]". If it is an electronic invitation, you can use the words "Dear [XXXXX]".

Text: The reason, time, place and activity arrangement of the invitation should be clearly stated in the text, and the language should be concise and clear to express the sincerity of the invitation.

End: You can write the name of the inviter at the end, such as "Salute!" Or "Start here and be invited by XXX!" Wait, if it is an electronic invitation, you can use the words "from here, XXX".

Signature: Write the contact information and date of the inviter at the end of the invitation letter, such as "Tel: XXX-XXXX-XXXX, Date: XX, XX". If it is an electronic invitation, you can use the date and electronic signature.