Earlier, a general knowledge teacher from St. Timothy's Primary School led primary five students to visit the National Security Exhibition Hall. The entire exhibition hall covers an area of ​​more than 1,100 square meters, and is divided into "National Security, Hong Kong, Home and People's Safety", "Motherland and Hong Kong", "National Security is closely related to you", "National Security Legislator and Long-term Peace", "Founder of National Security, Prosperity and Stability" and "National Security Participates Together" Composed of six units, the exhibition hall is very rich in content, in addition to a variety of precious exhibits. The exhibition hall also introduces the country's development and overall national security concept through lively and vivid methods such as three-dimensional short films, interactive games and animation appreciation. I believe that students will be able to understand the connotation and importance of national security after visiting.