Copy refers to the imitation of calligraphy and painting. Pro is written or drawn according to the original work; Imitation is to write or draw on the original with paper or silk. Copying can be an imitation of the original or a copy of the tablet. Copying directly from a flat plate with paper and ink is not copying, but rubbing.
Copying is a method of learning calligraphy and painting, and it can also be used to preserve the original works for exhibition, education and dissemination. But if you copy and forge the original, it can also be regarded as a fake.