The changing state of this ink color in the illusory third space (up and down one dimension, left and right two dimensions, directly extending from vision to the opposite depth direction, which is the third space of visual art in the plane body) is the "Mo Yun" that we should focus on.
The original meaning of "rhyme" is "harmony of sounds". "Shuo Wen Jie Zi" said: "Rhyme, harmony also. From the sound, it is the voice of the staff. " "Wen Xin Diao Long Law" says: "Different sounds are subordinate to harmony, and simultaneous sounds correspond to rhyme."