He sorted out ancient history and researched it in many ways and he attached importance to the exercise of historical knowledges. Based on the annotation view of the history,he demonstrated the political view by using the history facts.

• 他对古史进行过整理以及多方面的研究工作,他重视对历史知识的运用,基于一定的诠释立场对历史进行诠释,以史论政,史论一体,构成其学说的一大特色。