Children should have seen Japanese-style paper fans in movies and TV shows. You can fold it out with just a piece of paper, lets learn how to do it secretly~ While the classmates were still fanning themselves with books, you folded out a fan with a swipe, and you also made a Zhuge Kongming look, isn't it very cool? (^o^)/~
If you want a stronger Japanese style, the choice of paper is also very important. You must choose a pattern similar to the one in the first picture~