The descendant of Confucius at Qufu , the Duke Yansheng Kong Duanyou fled south with the Song Emperor to Quzhou , while the newly established Jin dynasty ( 1115 – 1234 ) in the north appointed Kong Duanyou 's brother Kong Duancao who remained in Qufu as Duke Yansheng . Zhang Xuan 張選 , a great @-@ grandson of Zhang Zai , also fled south with Gaozong .