Choosing Emperor Wu of the Han Dynasty can be answered from the aspects of politics, economy and culture: to sum up, strengthen centralization in politics, such as issuing promotion decrees (there are many specific measures, so I won't introduce them in detail here). Culturally, hundreds of schools were ousted, and Confucianism was the only one. Economically nationalize the salt and iron trade. Finally, don't forget to write that he fought against the Huns and opened up territory. In these aspects, it is more than enough to find relevant information in various aspects and write 500 words.