Prince Yong'an of Yunzhou is a significant political figure mentioned in the story. He is the current emperor's uncle, born from the same mother as the previous emperor. He holds the title of Prince and is associated with Yunzhou. Song Lin, despite being a common person, harbors hope that Prince Yong'an would succeed if he were to raise an army against the current regime, believing that such a change might give the Dayu Kingdom some hope. This reveals Song Lin's awareness of the political corruption at the court level and his desire for meaningful change, even if he has abandoned his own scholarly ambitions. He is mentioned as a potential figure who could restore hope to the kingdom.
