He created and summarized a set of his own analytical methods and theoretical systems, and then constantly applied them to the historical materials he collected, thus making the interpretation of history a manual labor.

He really loves history, and what he saw absolutely shocked ordinary people. It can be seen that he has been studying for a long time and has formed his own set of world views by synthesizing various viewpoints. I think from the perspective of knowledge reserve alone, he can even fail most graduate students majoring in history. Listening to his program, no matter whether the arguments are reasonable or not, the views he throws out can be refreshing.