Because many people forget their handwriting now, many people are typing on the computer now. If you don't write, the slow words will not look good, and then they will become childish. Then my colleagues said that your writing was immature. If you rule out the bad relationship between the two, then you really think your writing is immature. In this case, either your colleague's own handwriting is very good, and your handwriting is childish in comparison, just like the comparison between college students and primary school students. Or deliberately find fault and criticize you. There are many explanations for the immaturity of writing, sometimes it means that people's brushwork is immature, and sometimes it means fonts.