sentences:  Gao Cheng initially sent Han Gui (韓軌) against Hou, and Han had some successes against Hou's forces, but was forced to withdraw when Western Wei forces arrived, taking four of Hou's provinces in exchange for supporting Hou.Subsequently, Hou broke with Western Wei, and Western Wei forces withdrew.Meanwhile, Emperor Wu of Liang commissioned his nephew Xiao Yuanming the Marquess of Zhenyang with a large force to try to aid Hou.