"Sketch is China original? What about line drawing? What about line drawing? " Sketch is not original by China. You haven't seen Leonardo da Vinci's sketches. Very good. Line drawing in Chinese painting is called line drawing, because Chinese painting was originally created by China, and I think line drawing should be regarded as original by China.
"Sketch and line drawing can be formally classified as one category? Just from the form of the picture, regardless of painting skills or tools, regardless of the object and content of painting. " There are many forms of sketch, including line drawing.
Of course, line drawing is a kind of line drawing, but it is called line drawing in Chinese painting. Not only are the names different, but the lines that must come out first are also different. Because of the limitation of paper and tools, line drawing is more precise and delicate. It doesn't matter if the sketch is wrong, as long as you draw a right line again.
Generally speaking, children's stick figures in primary school are all lines, and the outline outlined with the simplest lines is a bit cartoon-like, which seems naive, but its bold and decisive use of lines and rich imagination is of great benefit to improving the coordination ability of hands and brains, the observation ability of eyes and the creative thinking ability.