What is the purpose of our history problem? Or what is the purpose of studying history? What do you want us to learn from history?

Then 1, first of all, depends on the main or correct aspects of the event and what is the significance of its correct aspects.

2, but also dialectical look, what is its bad side, or lessons.

3. From the perspective of development.

What role did historical events play (for whom) at that time? What role does it play in promoting history? Or how to evaluate it from the current point of view?

4, since it is a historical analysis, let you be a student, then when you extract ideas, you must be consistent with historical books or mainstream views in society (but to distinguish what is mainstream, such as Cao Cao's personal evaluation can not be evaluated by some China book thieves), and you can't be unconventional.

Although there are many views on historical events, it is your view on history books when you study that you need as an answer.

When I was discussing, I basically considered it according to my first three points, plus historical background and historical changes after the incident.