Ранняя Янь
Northern Wei's predecessor state Dai had previously been a vassal to Later Yan's predecessor state Former Yan, before both were destroyed by Former Qin—Former Yan's falling in 370 and Dai falling in 376—and the last prince of Dai, Tuoba Shiyijian, had successively married two Former Yan princesses as his wives, in 344 and 362.