Four years ago Si Qing: "I want you to be my exclusive verification code, which goes straight to the bottom of my heart." Yi Mu: "Do you still want to be embarrassed?" Four years later Si Qing: "Do we know each other? Who are you to me?" Yi Mu: "Yes, I am your exclusive verification code."
Concept: Everything has its own verification code. If the verification code is entered incorrectly, it means that you will not be able to proceed to the next step. If the verification code is entered correctly, it means you can proceed to the next step.