The above is an introduction to him, not to say that he is a member of China Calligraphers Association, but it is no problem to want to join China Calligraphers Association at his level, unless he doesn't want to (this is unlikely, as long as he practices calligraphy, there is no one who doesn't want to join China Calligraphers Association).
In addition, it should be the China Calligraphers Association, not the China Calligraphers Association.