Many arts are graded, and calligraphy is just one of them. It is a quantitative evaluation of artistic level. Divided into three, six and nine grades. However, what no one in the calligraphy circle admits is that the key depends on your real level, or some national competitions or exhibitions. Grading does not add points to the entrance examination, but it can be used as one of the reference conditions for joining the local book association. I hope my answer can help you.