How to divide the segments of brush calligraphy?

Calligraphy is graded, and the requirements are different where you look at the exam. It depends not only on the mastery of strokes, structure and composition, but also on its professional skills and artistic accomplishment. However, the level of calligraphy tested in the society is of little significance and is generally not recognized by the society. This is just a souvenir. Formal is to participate in exhibitions of calligraphers' associations at national, provincial, city and county levels, which is the most authoritative. I wonder if my answer is satisfactory?