The supplies get destroyed
Previously, when he rescued the Great Hoodwinker along with Wang Yun, Ji Zi'ang, and the others from the secret prison, the Great Hoodwinker had mentioned something to him. The reason why he got Ren Xiaosu to save them was that he wanted Wang Yun and Ji Zi'ang to become Ren Xiaosu's supporters in the Northwest.
Later, Ren Xiaosu would occasionally think about the matter of the "supporters" as well. It was not that he coveted power, but after experiencing so much, he realized that if he wanted to protect something, he would someday have to say goodbye to the days of him fighting alone.
Just as Ren Xiaosu had said, a true victory would not be dictated by a particular person but required tens of thousands of people to work hard together to achieve.
And what did Ren Xiaosu lack the most right now? Was he lacking in individual combat ability?