The Black Feather Army's current passageway to the north was through Nangeng City, Yun An City, Guang Liao City, and Wei Bei Pass.
The logistics team continued to transport resources along this path. When they were fighting in Wei Bei Pass, they did not have any grains in storage. The grains in Nangeng City had been set on fire and destroyed by Liu Yizhao, while the grains in Yun An City had been taken away by Lu Shu and the rest. Guang Liao City still had some reserves, but it was not enough for the Black Feather Army's daily consumption.
The Black Feather Army had hoped that they would be able to seize some rations in Wei Bei Pass, but they realized that this area was very poor. When the Long Meng Army had left, they did not have the opportunity to burn or take away the rations. Thus, they were only left with a small amount of rations.