Prince Ju, also known as Prince Ying of Changyi, was historically noted to have ended up in Hu County due to political upheaval during the Western Han Dynasty. After fleeing the capital, the series of events that led him there are part of the larger context of Han Dynasty intrigue and conflict.

1. Conflicts within the Imperial Family: The Han Dynasty was characterized by frequent disputes among the imperial family members, often leading to exiles and reassignments of different princes to various regions for strategic and political reasons.

2. Rebellion or Political Disgrace: Princes often found themselves in precarious situations either due to rumored rebellion or falling out of favor with the reigning emperor. In particular, being associated with any attempt to challenge the authority of the emperor could result in one being sent away from the capital to places like Hu County.

3. Imperial Command or Decree: Princes could also be assigned governing roles or territories outside the capital. Such appointments could serve both as a way to utilize their capabilities or to keep potentially problematic figures at a safe distance from the center of power.

Unfortunately, specific accounts of Prince Ju's journey to Hu County are sparse and fragmented in historical texts. To gain more comprehensive insights, reviewing historical records or annals such as the "Records of the Grand Historian" or the "Book of Han" would be advisable. These could provide detailed narratives and contexts of such events during the Han Dynasty.

For more detailed accounts on the topic, check out resources like:

• Historical texts or academic papers focused on the Han Dynasty.
• Online articles and databases that discuss figures such as Prince Ju and their historical importance.

If you need more specific references or sources, feel free to ask!