A Textual Research about the Homeland of the Poet Li Yuan in Tang Dynasty

There are various ideas about the homeland of the poet Li Yuan of Tang Dynasty: he himself declared his ancestry homeland is Longxi(western Shanxi Province) and later he was claimed to be born in. Yunan Town, Kuizhou County in Sichuan Province. But these ideas are either sparsely supported or lacks convincing evidence. But his three poems of nostalgia theme See my Family Brother off to visit Sichuan, Farewell to a Friend in Chang'an, Send people into Sichuan have much information of his homeland and we can thus determine Yunan Town in Kuizhou County as his homeland.