The Fourth Plenary Session of the 19th CPC Central Committee pointed out that we should stick to the road of Socialism with Chinese characteristics instead of the closed and rigid old road or the evil road of changing the flag. Over the past 70 years, the Communist Party of China (CPC) has led the people to explore the Socialism with Chinese characteristics road with great vitality in practice, creating a miracle of economic development and political stability that is rare in the world. This road has become the road of national development, national rejuvenation and people's happiness. A strong country must strengthen its army, which is the historical enlightenment of the Chinese nation for a hundred years. In old China, the country was undefended and the door was wide open. The imperialists opened the locked door with their guns. Therefore, a strong country must strengthen its army, and a strong army can safeguard national security.