A non-governmental organization wants to invite calligraphers who work outside the home to hold a painting and calligraphy exhibition. What is the format?

This should be an invitation, and the relevant format has been designed for you:

invitation letter

__________:

Great changes have taken place in my hometown XXX in the past 30 years of reform and opening up. The people's life in my hometown is booming and the cultural life is increasingly rich. At the same time, talents from my hometown to all parts of the country have made fascinating achievements through hard work. Your accomplishments in calligraphy make people in my hometown feel ashamed. As the organizer of XXXXX, I solemnly invite you to visit my hometown as a special guest. (time and place)

Signature: (XX unit, time, contact information)