《元史·本纪·卷十》
命令嘉定以西新归附的州郡以及田、杨两家各达官贵人的子弟，都充作人质入朝侍奉。
命嘉定以西新郑州郡及田、杨二家诸贵官子，俱充质子入侍。
It was ordered that the newly surrendered states and counties west of Jiading, as well as the children of the nobles of the Tian and Yang families, be sent to the capital as hostages.