There was once a company stationed on Kaishan Island. Later, the troops were disarmed and removed, and the militia was changed into guards. As a militia battalion commander and production captain, Wang Jicai was never afraid of hardship. He kept the island as his home and was determined to build a desert island into a green island until it could not be moved. He fulfilled his promise all his life and realized his dream with unremitting persistence and 32 years of sweat. Significance of keeping the island: Today, Kaishan Island has turned green. There are solar generators and wind turbines on the island to ensure power supply, and the basic conditions for the use of electrical appliances and the installation of cameras have been met. When the cell phone has a signal, you can use the wireless network. Looking back, people sincerely admire and admire Wang Jicai's responsibility and persistence, and feel his feelings of home and country. He truly combined his patriotic thought with the act of sacrifice and dedication. A day without defense is better than a day without war. This is what history has taught us. On the18th National Defense Education Day in China, various activities were carried out in many areas, some of which called for respecting the military profession, caring for martyrs' cemeteries, caring for martyrs' families, solving practical difficulties and so on. All activities are aimed at rallying the positive energy of the whole people's concern, support and construction of national defense. National defense is not "military national defense", nor is it just a matter for the People's Liberation Army. Each of us should have a sense of national defense. It is not that everyone needs to guard the island and the border, but even if they don't stick to it for many years, at least don't destroy border defense facilities and expose military facilities. When your plane flies over the military base, don't take photos online and reveal military secrets. Don't be cynical and chilling when others shoulder the burden of defending the country for us; When the hero of the country is in trouble, everyone can lend a helping hand to overcome the difficulties. We can do it! It is never out of date to be vigilant and defend the motherland.