《北史·列传·卷十六》
十六岁时出了本房，过继到常山公主膝下，尽人子之礼，十分孝顺。
年十六出后，事公主尽礼。
When he was 16 years old, he left his ancestral home and became the adopted son of Princess Changshan, where he showed great filial devotion to her as a son.