Sketch or copy sketch: Sketch is not very strict with painting tools. Generally speaking, tools that can leave traces on the surface of materials can be used for sketching, such as pencils, pens, markers, ballpoint pens, carbon pencils, charcoal sticks, writing brushes and so on.
Copying: Copying and copying are methods to imitate calligraphy and painting works according to the original works.
Pro is written or drawn according to the original work; ? Imitation is to write or draw on the original with thin paper (silk).