Since modern times, China has been subjected to aggression and bullying by Western powers. One principal reason is that China lacks complete national defense and strong military forces. In 1840, the First Opium War broke out. Since then, Western powers quickened their invasion by continuously launching the Second Opium War, the Sino-French War, the First Sino-Japanese War, and the War of Aggression against China by the Eight-Power Allied Forces, therefore, opened China’s doors with warships and cannons. They forced the decadent Qing government to sign a series of traitorous pacts, leaving China descend to a semi-colonial and semi-feudal society, and plunging the Chinese nation into severe dilemma. After the collapse of the Qing government, the old and new warlords were caught in endless internal fights and left no attention on external circle. The Kuomintang government was buried in civil war and kept construction uncultivated. Thus, the fact that China had no practical defence did not alter fundamentally, leading to its tragic breakage of territory in the War of Resistance Against Japan. After the founding of New China, under the firm leadership of the CPC, China has vigorously strengthened national defense and army construction, independently developed "Two Bombs and One Star" and modern weapons and equipment, established a relatively complete industrial system of national defense science and Technology. Inaddition, China has won the war of Resistance against the United States and Aiding Korea and other several self-defense and counter-attack operations in border areas, completely ending the history without practical national defense, making the era that western aggressors can dominate a country as long as they erect cannons on its coast gone and has won international status it deserves.
Since the 1990s, due to the vigorous rise of the new military revolution in the world and the suppression of hegemonism, China has gradually increased its investment in national defense and accelerated the modernization of national defense and army, making remarkable progress in the construction of mechanization and information. Nevertheless, compared with the other international military powers represented by the United States, China still lags far behind in conventional forces, strategic deterrence and strike forces, new combat forces, military organization and management modernization. It can be said that China urgently needs to speed up the modernization of national defense and army in an all-round way, either to adapt to the development of national economy, science and technology and the process of modernization, or to narrow the gap between itself and the other military powers in the world.