《新五代史·本纪·唐本纪第四》
国昌子克用，非常善于骑射，能仰面射中双水鸟，封为云州守捉使。
国昌子克用，尤善骑射，能仰中双凫，为云州守捉使。
Guochang's son Keyong was very good at riding and archery. He could shoot double water birds on his back, and was named the guard of Yunzhou.