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in fall 550, the people of Li Province (黎州, roughly modern Guangyuan, Sichuan) -- a minor province part of Xiao Ji's domain—rebelled and expelled the governor of Li Province, Zhang Ben (). The general Yang Fachen () entered Li, and he instigated two major clans of Li Province, the Wangs and the Jias, to petition Xiao Ji that Yang be allowed to become governor. Xiao Ji refused and imprisoned Yang's sons Yang Chongyong () and Yang Chonghu (). In response, Yang surrendered his territory to Western Wei.