elevated to its own commandery at some point between AD 454 and 464. The commandery included the districts of Yihuai (??) and Suining (??) in the south of the Red River (later is Tu Liêm and Hoài Duc districts) with a metropolis in what later was inner Hanoi.

By the year 679, the Tang dynasty changed the region's name to Annan , with Songping