Sometimes, I always pester my father to ask something that I can't understand in books. What is a phased array radar? What is a wire-guided mine? An Israeli-made step gun can shoot at a 90-degree turn, whether it is made in China or not. Dad said, "You students must learn all kinds of knowledge well. National defense equipment needs multi-disciplinary and multi-course talents to design, manufacture and use. The performance of an airplane depends on its flying speed and high-performance engine. How do warships become invisible? How can a submarine be designed to mute without being discovered by the other side? How can a missile hit accurately without electronic interference from the other side? These technologies are all academic frontiers and need top talents to achieve them. " Once, my father took me to visit a national defense education exhibition, and I learned a lot about national defense. How to avoid air strikes, how to prevent biochemical and atomic bombings, how to save yourself, etc ... At the same time, the development direction of foreign military technology, the reform of military thinking, advanced weapons and equipment, the gap between our army and foreign troops, etc ... are all issues of great concern to us. China's East China Sea and South China Sea are rich in oil and natural gas resources. Some countries are secretly exploiting them, and * * * is our land. Some people in Japan actually landed on the island and said it was their land ... how to defend the national interests? How to defend Wan Li's coastal areas and vast territory? Only a strong army and modern national defense can guarantee it.

However, in peacetime today, many people are very indifferent to the concept of national defense, and some people even don't. For example, on September 18 every year, many people did not respond to the air raid warning exercise, and some national defense facilities were vandalized. The concept of national defense must be strengthened, which requires the extensive participation of the whole society. National defense education should start from our middle school students.