 Yelü initially agreed, but later entered into relations with Later Liang.Meanwhile, Zhu sent his general Kang Huaizhen (康懷貞) to put Li Sizhao under siege at Lu Prefecture.Kang built walls and trenches around Lu Prefecture to cut off communications with the outside, and subsequent relief forces that Li Keyong sent under Zhou Dewei's command, while having some minor successes against Later Liang forces, were unable to lift the siege.