《宋史·本纪·卷十七》
于是拿出来给巨盖等人看，所书写的字迹极为端正严谨，巨盖等人道贺，于是奉制立赵煦为皇太子。
因出以示珪等，所书字极端谨，珪等称贺，遂奉制立为皇太子。
So he took it out for Ju Gai and others to see. The writing was very neat and meticulous. Ju Gai and others congratulated him, so they offered him the edict to establish Zhao Xu as the crown prince.