 Later, Qin escaped from Yang Lin's home and joined the rebellion in Wagang Fort.Yang Lin was very angry after knowing one of his adopted sons betrayed him.He asked his troop to attack Wagang Fort, but unfortunately, just before Wagang Fort's collapse, Wagang Fort's smart officer Xu Shiji (徐世勣, or Xu Maogong 徐茂公) subverted Yang Lin's assistant general Tang Bi (唐壁 in the book, or 唐弼 in real history).