April 15th is National Security Education Day. In order to draw students' attention to national security, we held a Chinese Ethnic Exhibition to introduce the characteristics of our country's 56 ethnic groups, as well as the peaceful coexistence, unity and friendship of all ethnic groups and the maintenance of national unity. We also organized a quiz game with prizes. Students participated enthusiastically and gained a deeper understanding of the country. The library held a book exhibition, exhibiting many books related to the Constitution, the National Security Law and the Basic Law.