So, Ji Yuan transferred military supplies from Xiping, and the rear was so busy that they were running around frantically. Chen Si Niang and others had to gather women to sew military uniforms and make armor while also inventorying the weapons made from the Wushan Iron Mine and then sending them to Chen County.
But by today, only five thousand sets of military equipment had arrived. Ji Yuan instructed Wang Nai and Xie Shi to select five thousand men to equip and follow the main army's movements, while the remaining would stay at the rear to "transport grain and act as reserve forces."
Wang Nai and Xie Shi agreed to this.
Just as the Xiongnu army rapidly approached Guan City, the Yu State Army launched a sudden attack on the Xiongnu in the area near Chen County, which had been stripped of many troops, forcing the Xiongnu to retreat and starting to reclaim lost territory.