Xiaosi is an ordinary primary school student. Xiao Si doesn't like doing geometry. Xiaosi just likes to hold a branch and imitate the sword dancing like the heroes in the novel in a place where no one is around. Every day after school, he would swing his branch in a remote corner of the school, and he could pull out five or six "sword flowers" at once.
However, one day, Xiaosi suddenly learned how to do geometry...
Intention: