《后汉书·列传·刘虞公孙瓚陶谦列传》
这时天子派使者段训给刘虞增加封邑，督率六州事务；拜公孙瓒为前将军，封易侯，假节，督率幽、并、青、冀四州。
会天子遣使者段训增虞封邑，督六州事；拜瓚前将军，封易侯，假节督幽、并、青、冀。
By this time, the Emperor had sent a messenger named Duan Xun to provide Liu Yu with an increased fiefdom, and to oversee six states; appointing Gongsun Zan as General of the Vanguard, giving him the title of Marquis of Yi, and allowing him to manage the four states of You, Bing, Qing and Ji.