Northern Wei
Wei, known in historiography as the Northern Wei, Tuoba Wei, Yuan Wei and Later Wei, was an imperial dynasty of China ruled by the Tuoba clan of the Xianbei. The first of the Northern dynasties, it ruled northern China from 386 to 535 AD during the period of the Northern and Southern dynasties. Described as "part of an era of political turbulence and intense social and cultural change", the Northern Wei dynasty is particularly noted for unifying northern China in 439 AD, bringing an end to the chaotic Sixteen Kingdoms period, and strengthening imperial control over the rural landscape via reforms in 485 AD.