Seisei HAI (date of birth and death unknown) was an envoy who visited Wakoku (Japan) in accordance with the orders of Yo-dai (Emperor Yang) of the Sui Dynasty in the first half of the seventh century.
裴世清（はいせいせい、生没年不明）は、7世紀前半に中国王朝隋の煬帝による命で俀國（倭国）を訪れた使者。