It can be said that the Cao family treated the main family poorly, and the pit of the Nine-Rank System was already dug up when Cao Ang died.
There was no way around it; after Cao Ang's death, the Seven Xiahou Brothers, regardless of the disputes among Cao Pi, Cao Zhi, and Cao Zhang, did their tasks well without error. However, when Cao Pi, Cao Zhi, and Cao Zhang rose to power, Xiahou family's indifference at the time became a thorn for all of them.
Furthermore, due to Cao Ang's desire for stability back then, the basic disparity in distribution of power was determined, ensuring that the resources controlled by the three brothers were not vastly different.
