《隋书·列传·卷十八》
不久，胡人侵犯岷州、洮州二州，子干统兵赶去，贼人闻讯逃走。
俄而虏寇岷、洮二州，子干勒兵赴之，贼闻而遁去。
Not long after, the Hu people invaded Minzhou and Taozhou, Ziguan led troops to chase them off, and the rebels fled after hearing the news.