《元史·列传·卷四十》
世祖在即位前就知居贞贤能，召入王府，使他监筑上都城。
世祖在潜邸，知其贤，召用之，俾监筑上都城。
Shizu knew that JueyZhen was capable before he ascended to the throne and summoned him to the prince's mansion to oversee the construction of the Shangdu City.