The historical period from the Opium War to War of Resistance against Japanese Aggression's victory fully embodies the truth that weak countries have no diplomacy, especially the Versailles-Washington Conference held after the First World War. The United States, Britain, France and other countries ignored China's sovereignty and territorial integrity and forcibly handed over German rights and interests in China to China at the Paris Peace Conference. The "open door" policy put forward by the United States at the Washington Conference and the signing of the Nine-Nation Convention actually brought China back to the situation of several imperialist countries.

In a word, strength is the foundation of diplomacy.