《元史·列传·卷八十一》
十一年，州人秦观保造兵械，图谋不轨，亦为齐所擒诛。
十一年，州人秦观保造兵仗，将图劫掠，复获而行诛。
In the eleventh year, the state people Qin Guanbao built weapons and planned to commit illegal acts, but he was also captured and executed by Qi.