According to the analysis of material 4, what changes have taken place in the economy of the Western Han Dynasty since Emperor Wu of the Han Dynasty compared with the early Han Dynasty?

Hello, I think that in the early years of the Western Han Dynasty, the economic strength of the Han Dynasty was not restored, and the internal stability was not enough, from Liu Bang to the Han Dynasty.

Emperor Wu of the Han Dynasty always adopted a pro-Xiongnu policy in his early years, giving Xiongnu a lot of gifts and money every year. However, and

The pro-government failed to stop the plunder of Xiongnu nobles, and the production in the northern frontier was repeatedly destroyed, resulting in countless Han Chinese.

Robbed or killed. After Emperor Wu of the Han Dynasty ascended the throne, the autocratic centralization was strengthened unprecedentedly, and the social economy developed greatly.

The strength has also been strengthened. Emperor Wu of the Han Dynasty decided to change the pro-Qin policy and launch a large-scale war against Xiongnu in an all-round way.

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