There are no obvious lines on rice paper, which is more suitable for practicing calligraphy quickly. For example, cursive script is more suitable for writing on a smooth surface to improve writing speed. The rough surface lines are obvious, and there is a certain resistance when writing, which is suitable for the writing of running script. After increasing the intensity, the pen tip written is tighter and more direct.
In calligraphy, because the smooth surface will be smoother and there will be no obvious lines, it is more suitable for fast pen movement. Many people improve their writing speed by practicing smooth surfaces.
Rough surface is more suitable for writing because of its rough texture. Especially when writing running script, it will naturally increase the intensity of writing. This way of writing is tight, unlike writing smoothly.