 With Wang Sizheng advocating taking four provinces that Hou offered in exchange for aid, however, Yuwen sent Li Bi (李弼) and Zhao Gui to assist Wang, initially forcing Eastern Wei forces attacking Hou to withdraw.Soon, however, Western Wei generals and Hou began to suspect each other, and after Yuwen ordered Hou to proceed to Chang'an to greet Emperor Wen and Hou refused, the sides officially broke, and the Western Wei generals held onto the four provinces without rendering further aid to Hou, who from that point on depending solely on Liang aid.