Wei Song had never doubted the true identity of Slave Huan back in Biyu City. However, when Gu Shenwei went against Golden Roc Fort by claiming to be the son of Yang Zheng (a servant of Gu family), Wei Song suddenly realized who Slave Huan really was.
Wei Song's relationship with Gu Lun had been closer than Gu Shenwei had imagined. He was only a child at the time and had rarely participated the affairs of adults, so he had never witnessed the frequent exchanges and mutual support between Wei Song and Gu Lun in the Court.
Wei Song also knew Yang Zheng -- so well so that he knew the old servant had never married nor had any children. He also knew that Gu Shenwei's nickname was Huan'er.
Wei Song explained why he had not said anything since realizing the truth.
