《资治通鉴·唐纪·唐纪四十九》
庚辰，德宗任命虔州刺史赵昌为安南都护，于是群蛮安定下来了。
庚辰，以虔州刺史赵昌为安南都护，群蛮遂安。
On Gengchen, Emperor Dezong appointed Zhao Chang, the Prefect of Ganzhou, as Pacification Commissioner of Annan, and so the various Man tribes settled down.