Historian Sun Jinji has claimed that Hanpu's surname was already Wanyan before he moved from Goryeo, and that he was therefore a Jurchen whose family had lived in Silla and then Goryeo before moving back to Jurchen land. Chinese historians Menggutuoli and Zhao Yongchun both argue that Hanpu's ancestors were Jurchens who had lived in Silla and had been absorbed into Goryeo after the latter defeated Silla. Furthermore, Zhao theorizes that Wanyan Yingge calling Goryeo his "parent country" may have been part of the Jurchens' diplomatic efforts to obtain Goryeo's help in fighting the Khitan Liao.