Hsu Hsuan-p'ing wrote a great many poems and left many behind at inns and way stations along the road. During the T'ien Pao period (742-755) of the T'ang Dynasty, the great poet Li Po came across one of Hsu's poems on a trip east and exclaimed, "This is the work of an immortal!"
許宣平詩作甚多，常於驛路旅社留詩。天寶年間（七四二﹘﹘七五五），詩仙李白東遊，見宣平詩，嘆道：「此仙人詩也！」