The reasons are as follows: If you are a student, you need to use a gel pen for the exam (especially for the senior high school entrance examination and college entrance examination) (although the exam instructions say that you can use a pen, I believe your teacher will never let you use it, because if you drop a drop of ink, your exam will be ruined. Moreover, the appearance of test paper is unified nationwide, but the paper is not unified nationwide, so there is the possibility of "shadow paper".
Gel pens are convenient, students write more, and they don't need to change pens often. The pen is too picky about paper, and some papers can't be written with a gel pen. Before the popularity of gel pens, the public always thought that pens and brushes could practice Chinese characters. When gel pens first became popular, the public didn't think much of practicing calligraphy with gel pens.
Because gel pen can't reflect the thickness of strokes, with the use of gel pen, more and more people began to find that gel pen can also practice Chinese characters, but the concept of practicing Chinese characters with gel pen is different from that with pen. Pens have many advantages, and a good pen is very suitable for practicing calligraphy.
Before the appearance of gel pen, when it comes to hard pen calligraphy, it usually refers to pen calligraphy. Hard-pen copybooks seen in the market are basically made of pens. Although there used to be copybooks written by ballpoint pens, there were few, let alone pencils. The biggest advantage of a pen is that it can write an effect close to that of a brush.