On the northern front, after resisting for around twenty days, the Qin Army took the initiative to abandon Wangdu. They truly could not hold on any longer; the attacks by the Tang Army were too fierce.
Almost every day, thousands of soldiers died or were wounded, and the massive losses gradually made it difficult for the Qin Army to sustain. The defensive fortifications previously deployed near Wangdu were completely exhausted, and Chen Li was struggling to hold on.
So he petitioned Ying Duo and finally received the order he wanted: the main force of the Qin Army would retreat to near the West Great Pass to continue defense, leaving the now almost ruined Wangdu to the Tang Army.
With the loss of Wangdu, the garrisons at Xiqing and Caili, which were nearly surrounded, all surrendered, and Bingshuo City north of Wangdu also lost its contact with the Qin-controlled area.
