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In spring 553, with Xiao Ji and Xiao Yi, both of whom having claimed Liang's imperial title after Hou's fall, battling each other, Xiao Yi sought aid from Western Wei, requesting Western Wei to attack Xiao Ji's home base of Chengdu (成都, in modern Chengdu, Sichuan) from the rear. Yuwen sent his nephew Yuchi Jiong to attack Xiao Ji's domain (modern Sichuan and Chongqing). Most of Xiao Ji's domain fell into Western Wei hands, and subsequently, Xiao Ji was defeated and captured by Xiao Yi.