There are mainly struggles of the peasant class: the Taiping Heavenly Kingdom Movement and the Boxer Rebellion; The reform movement of the landlord class: Westernization Movement; Bourgeois reformists: the Reform Movement of 1898; Bourgeois revolutionaries: Xinhai Revolution. First, the anti-aggression war launched by the people of China in modern times has dealt a heavy blow to the imperialists' ambition to invade China and shattered their plot to carve up China and turn China into a complete colony. The imperialist powers launched wars of aggression against China again and again, not only for the sake of trade, but for the purpose of plundering and expanding the colonies and for their own colonial expansion interests. Every war is accompanied by bigger dreams and more benefits. However, every invasion was resisted by the people of China, which made their arrogance and ambition impossible. It is the heroic struggle of the people of China that shows the indomitable patriotism of the people of China, and also gives foreign invaders a heavy blow and profound lesson, making them realize more and more clearly that China is an invincible country. Although they can force the Qing government to sign one unequal treaty after another, they can never turn China into their complete colony. Especially after the Sino-Japanese War of 1894-1895, people from all walks of life in China made great efforts to explore and struggle for survival, which made the invaders see the unyielding great power hidden among the people of China and had to give up the policy of carving up China. Second, the anti-aggression war waged by the people of China in modern times has educated the people of China, inspired the national spirit of the Chinese nation, inspired the people's fighting spirit against imperialism and feudalism, and greatly improved the national awareness of the people of China. Imperialist aggression has brought great disasters to the Chinese nation, but there is no great historical disaster that has not been compensated by historical progress. The war of aggression against China launched by foreign powers and the failure of China people's anti-aggression war have educated the people of China from the opposite side and greatly promoted the people of China to think, explore and catch up. After the Opium War, advanced China people began to learn from their mistakes, pay attention to understanding the international situation, study foreign historical geography, sum up the lessons of failure, and look for ways to save the country and defend the enemy, which led to the idea of learning from foreigners and mastering foreign skills. After the Sino-Japanese War of 1894-1895, when the Chinese nation was facing life and death, stimulated by the imperialist carve-up frenzy and national crisis, the whole nation began to have a general awakening of national consciousness, and the idea of saving the nation from extinction was rising day by day. It is this sense of crisis of national subjugation and extinction that enhances the national identity and cohesion of the Chinese nation and becomes the foundation for the Chinese nation to stand on its own feet and stand forever in the world.