Suddenly, a burst of yelling came from the phone, followed by a loud "crack"... A sharp sound, likely the shattering of Xiao Ning's phone.,Today, it should have been a day for my teacher to impart knowledge and resolve doubts. Yet, I don't know what happened to make him so angry!,Beside Gu Nanfei, a doctor wearing gold-rimmed glasses put on a mask expressionlessly.。