Answer: The calligraphy style is not limited to pen writing, but the writing effects of pens and brushes are different. No matter what kind of font can be written with one tool, it only depends on the form it appears. It's different. If you practice with a pen, it means you are practicing pen calligraphy. There is nothing wrong with it. As mentioned above, oracle bone inscriptions are also carved, but we can evolve it into a calligraphy style. , you can write with both brushes and fountain pens. In addition, hard-pen calligraphy is mainly pens, but it is not limited to fountain pens. Hard-pens are relative to brushes. Nowadays, there are various calligraphy pens that can produce very good results, but The pens used in pen calligraphy are ordinary pens, excluding those "improved" calligraphy pens. It is best to use ordinary pens to practice calligraphy. It is simple and practical. Once the calligraphy is written, the pen is just a tool. You can change it to other writing methods. Tools, this is just a process of becoming familiar with writing tools