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Xiao Yuanzhao, still at Baidicheng, was meanwhile intentionally feeding his father incorrect information—that not only had Xiao Yi not defeated Hou, but that he was on the verge of destruction by Hou's forces. Xiao Ji therefore led his forces and departed from Chengdu, planning to confront Hou. He left Xiao Hui and his son Xiao Yuansu () the Prince of Yidu in charge of Chengdu. in response, Xiao Yi carved Xiao Ji's likeness onto a wooden board, and personally hammered nails into the image to curse Xiao Ji. He also sent captives from Hou's army to Xiao Ji to show that Hou had already been destroyed. However, Xiao Yuanzhao detained Xiao Yi's messengers and continued to feed his father incorrect information, and Xiao Ji speeded up his troops. Xiao Yi, fearful of what Xiao Ji might do, requested Western Wei to attack Xiao Ji from the rear, and Yuwen, believing that Yi Province could be taken, sent his nephew Yuchi Jiong with an army to attack Yi Province. Both Yang Fachen and Yang Qianyun surrendered to Western Wei, and Yuchi quickly arrived at Chengdu and put it under siege.