This method of painting is called copying.
The process of copying calligraphy and painting works based on the original works is called copying. Lin means to write or draw according to the original work; imitation means to write or draw on top of the original work with thin paper (silk). In the broad sense of copying, what is imitated is not necessarily calligraphy and painting, but may also be steles, calligraphy, etc.
Copying is a method of learning the calligraphy of predecessors in ancient times. It was first mentioned in Huang Bosi's "Dongguan Yulun·On the Two Methods of Copying" in the Song Dynasty: "Lin means to put paper next to the ancient calligraphy. Observe it. Learning from the situation is like copying a painting, so it is called copying.
It means that lin is to place a stele and calligraphy aside and write according to its strokes, which is called "du lin". Covering the stele and calligraphy with thin paper and copying according to its traces is called "duo lin". What you learn from lintie are the strokes of the font. Characteristics, thickness and size, and copying is to imitate the strokes and frame structure of the font to write the charm of the font.
Extended information
"Lin" and "copy" are two different concepts. "Lin" focuses on learning the ancients' writing styles. Through our reading of posts, we can understand the ancients' writing styles. Use pen characteristics and then express them through our pens. Although it is written based on the ancient post, there is definitely a certain gap between it and the original post in terms of accuracy.
The "copy" is much more accurate than the "pro", because it is directly overlaid on the original post, so the shape and position arrangement of the strokes will be more faithful to the original post. For beginners, who do not yet have an in-depth understanding of the characteristics of the pen and the arrangement of strokes, copying is easier to get started.
After a period of copying, you will have a more intuitive understanding of the ancient people's brushwork and structure. Although they are just copying gourds and drawings, it is still very helpful to beginners. After a period of copying, and then comparing it with the original post, it will be easier to get the deep meaning of the original post.