Lu Yunchi got into a conflict with Zhang Xiaobing at kindergarten during recess. Zhang Xiaobing snatched Yunchi's paper airplane and insulted Li Mian. Yunchi hit Zhang Xiaobing, causing a thin scratch on his forehead. The incident led to a confrontation between the parents in the kindergarten office, which was resolved when Zhang Xiaobing's mother learned Lu Yunchi is Commander Lu's son and fled.
