Reviewing the past is beneficial not only to the present but also to the future.History has the two sides of both repeating itself and constantly renewing itself and so does future history.History is like a vast and boundless sea.How should we study history? We should learn from historical figures,their major influences in the historical development Reviewing the past is beneficial not only to the present but also to the future. History has the two sides of both repeating itself and constantly renewing itself and so does future history. History is like a vast and boundless sea. How should we study history? We should learn from historical figures, their major influences in the historical development