Why did the Juchen tribes rebel against the Khitan Liao empire?

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Map of eastern Asia highlighting Manchuria in northeastern China, which includes the provinces of Heilongjiang, Jilin, Liaoning, and part of the Inner Mongolia Autonomous Region. The highlighted area borders Russia, Mongolia, and North Korea. — Manchuria The historical region of Manchuria shown with the boundaries of the modern-day Chinese provinces in its place as well as the portion of the Inner Mongolia Autonomous Region that is often considered part of Manchuria.

The Juchen tribes, who were originally vassals of the Khitan Liao dynasty, rebelled due to long-standing dissatisfaction with their subordinate status and the declining administrative and military efficiency of the Liao empire.123

Tensions escalated as the Liao empire weakened in the late 11th century, leading to frequent rebellions among its non-Khitan subjects. A pivotal moment occurred in 1112 when the last Liao emperor visited the Juchen homeland and demanded that the tribal chiefs dance for him; the Juchen leader, Aguda, refused to comply. This act of defiance signaled the end of their allegiance.21

Aguda formally proclaimed the establishment of the Jin dynasty in 1115 and, supported by an alliance with the Chinese Song dynasty, successfully overthrew the Liao empire by 1125.4123