What is "left-handed and right-handed" in calligraphy?

Refers to the left and right structure of words, with left as the main word and left prominent; Let the right side stand out when the right side is the main word. Calligraphy should be avoided. You can't be too big for me. If you are too long for me, you must make sacrifices with some strokes. The left side is dominant, the right side will shrink, the upper side is dominant and the lower side will shrink.