Duke Yansheng
During the Southern Song dynasty, the Duke Yansheng Kong Duanyou fled south with the Song Emperor to Quzhou in Zhejiang, 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. From that time up until the Yuan dynasty, there were two Duke Yanshengs, one in the north in Qufu and the other in the south at Quzhou. An invitation to come back to Qufu was extended to the southern Duke Yansheng Kong Zhu by the Yuan-dynasty Emperor Kublai Khan. The title was taken away from the southern branch after Kong Zhu rejected the invitation, so the northern branch of the family kept the title of Duke Yansheng. The southern branch remained in Quzhou where they live to this day. Confucius's descendants in Quzhou alone number 30,000. The Hanlin Academy rank of Wujing boshi 五經博士 was awarded to the southern branch at Quzhou by a Ming Emperor while the northern branch at Qufu held the title Duke Yansheng. The leader of the southern branch is 孔祥楷 Kong Xiangkai.