Yuchi originally knew nothing about the Great Tang Prison, but just now, while walking towards the government office with Xun Xian, Xun Xian quickly explained the situation to him.
The Star Observatory is a place for training the Celestial Capital Department elites, and the Great Tang Prison trains the Defense Department elites. On this point, the two seem somewhat similar, but in reality, they are vastly different.
Take Chen Guangsheng from Xufu Town, for example. He hails from the Star Observatory, though perhaps not the same Star Observatory where Song Yinghan is. Nonetheless, he is someone who emerged from the Star Observatory.
Similarly, in Xufu Town, Xun Xian did not come from the Great Tang Prison; rather, she was someone Xun Yu nurtured over the years, having a somewhat unconventional background.
