ELO Mechanism of Life

Everyone must know how disgusting the ELO mechanism is. Chen Fan originally thought that this broken mechanism only existed in games. Until he discovered: My life was actually welded to death by this damn ELO! If he reviews carefully, he will surely get wrong questions in the exam; He worked hard on the project, but his colleagues blamed him and his boss stabbed him in the back. In the past, he didn't understand the rules and was beaten by fate. Now, the rules are clearly laid out in front of us. He wants to understand this damn mechanism with his own hands!