What's the difference between a fairy typing a form with a red and black pen?

There is no difference. Generally, whether to use a red pen or a black pen is judged according to the type of paper. Use a red pen for yellow paper and a black pen for red paper. There are no special taboos.

For the type of pen, fine art pen, thick pointed pen and so on can be used. The words written by the artistic pen look good, and the flowers dipped in the pen depend on the pen tip. If the capillary of a thick pen is too thin, the thick pen tip will also lead to ugly handwriting.

Table text is a chapter letter composed of words, which is a bridge between immortals and mortals. Generally, there are strict writing formats, text arrangement and content language. It is usually used to worship the watch in the last chapter, or to pray for good luck.