《旧五代史·后唐·列传十七》
李建及有胆量，慷慨不群，临阵治军，意气雄壮。自庄宗到魏州，李建及都总内外衙银枪效节帐前亲军。善于统御部下，所得到的赏赐都分给部下，很得军心。
建及有胆气，慷慨不群，临阵鞠旅，意气横壮，自庄宗至魏州，建及都总内外衙银枪效节帐前亲军，善于抚御，所得赏赐，皆分给部下，绝甘分少，颇洽军情。
Li Jianji was courageous, magnanimous and outstanding. When he was in front of the army, he was heroic and vigorous. Since Zhuangzong arrived in Weizhou, Li Jianji commanded the guards of the inner and outer yamen to supervise the Imperial Guard in front of the account. He was good at commanding subordinates, and he shared all the rewards he received with his subordinates, which won the hearts of the military.