How old is the sixth grade of calligraphy?

It's an intermediate level. Calligraphy grades 4 to 7 belong to the intermediate level. 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.