On September 25, Yan Zongmin, principal of Kangjie High School in Yuncheng, Shanxi, responded to controversies regarding holiday arrangements, flag-raising ceremonies, September 18th activities, and students posting slogans, admitting that his work was inadequate and stating that the police (Public Security) have intervened to investigate the matter of students posting notes.[Student Rights and Interests][Speech Censorship][Yuncheng][Education Rights Protection][Kangjie High School][Yan Zongmin]