1, reading historical materials: reading and analyzing historical materials and discovering the truth of history are the basic methods of historical research.

2. Isolated evidence does not hold: In order to prove a conclusion, design experiments from different angles or find evidence to prove it.

3. Double evidence law: It has become a recognized scientific and academic trend to consider ancient history and culture with the mutual confirmation of "new underground materials" and ancient documents.

4. Interdisciplinary research: a new discipline that takes the same problems between disciplines as the research object, uses multidisciplinary theories and methods to explore ways to solve problems, and promotes the comprehensive and coordinated development of disciplines and technologies.

There are many other ways, and those who are interested can learn by themselves.