Why did Emperor Wu of the Han Dynasty and Chengzu of the Ming Dynasty succeed, while Emperor Jianwen ended in failure?

Why did Emperor Wu of the Han Dynasty and Chengzu of the Ming Dynasty succeed, while Emperor Jianwen ended in failure?
There is a great similarity between the Han Dynasty and the Ming Dynasty: the issue of vassal kings.

there is a great similarity between the Han Dynasty and the Ming Dynasty: the issue of vassal kings. Liu Bang, the great ancestor of the Han Dynasty, was worried about the clan king with different surnames, so he divided his son and other descendants of his surname into clan kings with the same surname, allowing them to cooperate with the central government to manage the land and guard the border areas.

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