National heroes refer to people with lofty ideals who gave their lives and made outstanding contributions to safeguarding the sovereignty integrity of national territory, territorial sea and airspace, safeguarding national security, safeguarding people's interests and national dignity in previous anti-aggression wars.
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In a narrow sense, national heroes refer to those who have made outstanding contributions in the struggle against foreign aggression and oppression, including those who are not afraid of violence or sacrifice in the struggle. The above definitions are applicable to any ethnic group, and are not limited by geographical and historical time, success or failure or the size of people.
A national hero in a broad sense refers to a person who has made outstanding contributions to the development and prosperity of his own nation during the period of peaceful change. From the reform of Kangliang, the educational innovation of He Ziyuan, and then to the democratic revolution of Sun Yat-sen, national heroes are shining.
Another example is an invention that benefits or brings honor to the country; A theory that contributes to the world and an actor that wins glory for the nation can all be called national heroes. Such as Qian Xuesen and Deng Jiaxian, national heroes of contemporary China.
References:
Baidu encyclopedia-national hero