Forgetting history means betrayal ",in fact, the original words are" Forgetting the past means betrayal ",which is just a line in Lenin's children's play" In the Name of Revolution "written in China. "Past" and "history" have similar meanings. The original intention of this sentence is to inspire millions of working people not to forget the history of slavery and oppression, and to call on them to take action against capitalist regimes and foreign aggression, which has its historical background.