Jiang Xubei is good at everything except mathematics.
Luo Ping, he would never regret anything he did, but it happened to be Jiang Xubei's math teacher. He said this was the thing he regretted the most in his history.
Under the new year's white-cut black fishing system, if you use a little bit of attack, you will be cruel and soft-hearted.
Intention: I'm not good at math and I'm humiliating myself by writing this.