Who knows what it means if a boy sends a card to a girl?

Who knows what it means if a boy sends a card to a girl? In fact, the reason is very simple. Since a boy can give a girl a hairpin, it means that this boy likes this girl very much. I hope she can dress more beautifully. Let the girl wear the hairpin he gave her, and he can see it every day. He will be very happy when he sees the hairpin he gave the girl. So as a girl, if she really likes that boy, she can accept hairpins. If she doesn't like it, she can refuse the hairpin that the boy gave her.