How can a teacher who has just handed in a calligraphy class send an introduction in the calligraphy group?

Direct introduction.

Calligraphy is an artistic expression of the unique beauty of words in China and neighboring countries and regions deeply influenced by China culture. Including China calligraphy, Mongolian calligraphy, Arabic calligraphy and English calligraphy. His China Calligraphy is a unique traditional Chinese character art in China.