What is a calligraphy pen?

"Using a pen" in calligraphy refers to the way, method and effect of strokes. China's calligraphy is mainly stippling, and the tools used are mainly sharp pens. Therefore, it is very important to write and transport pens correctly. The height and thickness of the pen, the quickness and Fiona Fang of the pen, the concealment and smoothness of the nib, the length and thickness of stippling, the force and texture of brushwork and so on. All need to be realized with a precise pen. "Using ink" in calligraphy refers to the coloring degree of ink, such as shade and dryness, which makes the ink color varied and watertight. For example, in the Ming Dynasty, Dong Qichang often used light ink, and its style faded. Yan Zhenqing's regular script in the Tang Dynasty used thick ink, which was dignified, heavy and powerful.