Today, I posted a work in my hand, which was clearly labeled as forbidden for girls to read this work, but why do girls still read my work?

People are curious. Curiosity killed the cat! The less you let her see you, the more you will attract her attention. The more you forbid it, the more she wants to see it. If you really don't want them to see it, the best way is to give your work an obscure name and don't promote your work. Otherwise, there will be no money here, and more girls will come to see your works.