 The "Records of the Grand Historian" says he came to a place with "flat plains and wide swamps" (平原廣澤) and proclaimed himself king, never to return.Later historical texts were also unclear on the location of Xu's final destination.Records of the Three Kingdoms and Book of the Later Han, and "Guadi Zhi" all state that he landed in "Danzhou" (亶州), but the whereabouts of Danzhou are unknown.