The third son of the Song family, the youngest son treasured by his parents. He is a scholar preparing for the imperial examinations scheduled for spring. He claimed that Song Beichen owed him a debt of gratitude because he once jumped into a river to save Beichen's life, suffering a high fever for three months afterward. He used this incident as leverage for over a decade to extract money from Beichen. He argued that Xiaoyu should be sold as a ghost bride to fund his education.
