Is it useful to draw characters yourself?

It's useless to draw. It's just for peace of mind. If you have a good attitude, don't seek symbols.

First of all, what is register? It is a medium for Taoist priests, Yin and Yang teachers and others to use the power of related gods to deal with certain things. For example, this is just like the application documents submitted to government agencies. The format has strict requirements. Wrong format, no one will pay attention to you. So, if you make a mistake, this thing is a piece of waste paper. Moreover, even if the strokes drawn by the master are exactly the same, this record may not be valid. Whether a record can work or not, there are other constraints, such as one's own skill, piety and so on. Therefore, your own records are just like the graffiti that children learn to write in Chinese calligraphy, and will not have any bad influence on themselves.

Secondly, according to different students, the materials used by Fulu are generally divided into two types. One is that Taoist painters use yellow paper cinnabar, and the other is that alchemists of Yin and Yang draw symbols with red paper and gold powder. Some of these materials are just yellow paper used by Taoist priests. According to the folk saying, because Mingbi is mostly printed on the yellow paper used in Taoist paintings, this yellow paper, which means Mingbi, is easy to provoke ghosts and gods.

I have seen the materials you scribble, but not this kind of ephedra paper. The materials you scribble will not be bad for you.

To sum up, it won't be unlucky or bad for you.