In ancient times, people sentenced to death would write down their vows in red letters.
The name of the deceased on the tombstone is usually painted red. If this person's name is written in red, it means cursing others to die.
You can't write your name in red pen, because in China's traditional customs, red represents auspiciousness and happiness, and writing other people's names in red pen is taboo. In the past, the emperor's recitation was expressed by Zhu Hongbi, which was called Zhu Pi. No one but the emperor can give orders in scarlet letters. In addition, it is said that when Yan Luowang writes a life and death book, people who are going to die will be marked in red. As long as Yan Luowang writes their names in red ink, it means the time is coming. Therefore, in the traditional customs of China, people's names are not allowed to be written in red.