Mo Fei and Mo Yi were wandering in a store picking out musical instruments when Zheng Xuan bumped into the door. Seeing Zheng Xuan coming up to them, Mo Fei wore a face of alert, “Hey, Zheng Xuan, behave yourself!” Zheng Xuan turned to Mo Yi and said cautiously, “Seven, I got something to say to you.” “Seven? Yiyi, since ...