Linearity: including length, thickness, radian, Fiona Fang, etc.
Linearity: The quality of lines can generally be understood as roundness, thickness, smoothness and smoothness.
Linear structure: that is, the way of crossing and framing between lines or the structural form of crossing and connecting. The structural form mainly points to the spatial linear law (the rhythm and rhythm of lines in the running process)
Rhyme: the charm and temperament of a line
I hope it helps you. Of course, these are all from the theoretical construction, and you need to practice and try again and again in your writing practice. The key is to be able to write lines that are crucial and conform to the way of nature.