You can't judge a person like this. There are many reasons why a person does not change his signature. 1. If this person is trying to save his signature for others to see, there are many reasons for doing so. If this person wants to attract people's attention by not changing his signature for a long time, it is ok. People who don't change their signatures for a long time are probably because they think the meaning of this signature is good. I guess he thinks it's more meaningful than other signatures. Signature is widely used as a label now, just as the book he reads always has bookmarks. He wants to be alert to himself and make himself understand some truth. I still want more people to know this truth. To judge a person's character, we should not only see that he never changes his signature frequently, but also look at it together. This is king. If you say it unilaterally, this statement is too simple. I have thought of these for the time being and hope to adopt them.