The plot of a play

In the Northern Song Dynasty, Yang Jiajiang fought a bloody battle with Liao in Golden Beach. Shiro Yang Yanhui was captured before the battle. She changed her name and married Princess Tiejing. After the Liao Dynasty, Xiao Tianzuo set up the Tianmen array, Liu Lang Yanzhao went out, and his mother She Taijun pledged grain. Shiro longed for his mother, and the princess stole Xiao Taihou's direction, helped him go through the customs, and made his mother and son meet. Shiro returned to Liao Ying, Xiao Taihou pleaded guilty, and the princess asked for forgiveness.