school were "despicable acts of intimidation of the school management" and were unacceptable. National Security Education In February 2021, the Education Bureau, under Kevin Yeung, announced changes to the education system to incorporate the National Security Law. Notices to teachers explained that teachers should educate students as young as 6 years old about the national security law. In response, Ip Kin-yuen, the vice-president of the Professional Teachers' Union, said that he was astounded to see the "vast scope" of the new rules as well as the lack of consultation with teachers before the rules were published. Later in February 2021, the Education Bureau released a 1,200-word guideline for implementation of the changes, claiming it was "obliged to clarify" so-called misunderstandings by the media when it had announced changes earlier in the month. Ip Kin-yuen responded and said that the guidelines would do little, and that the Education Bureau "should also hold proper consultation sessions among educators and members of the public to explain about the guidelines in detail, listen to their thoughts and opinions, as well as respond to questions and even defend it for themselves if they want". In March 2021, the government announced that the Education Bureau would begin distributing books to all primary and secondary schools in Hong Kong, meant to cover topics such as national identity and the national security law. In July 2022, Education Bureau chief Christine Choi Yuk-lin said that national education is not "brainwashing". Choi also said that Hong Kong students must learn about the history of China's socialist system, and must understand why it is suitable for China. Choi later said that students must learn from Xi Jinping's speech on Hong Kong, and that the Education Bureau would hold sessions with school principals and teachers on the speech. Choi also said that if students show that they want China to do well during flag-raising ceremonies or study tours, then it would meet the target of effective national education. In contrast, Priscilla Leung argued and said about the study tours that "In fact, many students have come back from these visits [saying] they don't believe in what they saw, [they claimed] everything was staged." In September 2022, the Bureau released the updated Primary Education Curriculum Guide, which suggested between 19-25% of the student's lesson time should be devoted to national education and national security education. In October 2022, the Education Bureau revealed the