Xu Elina-Qian (2005). Historical Development of the Pre-Dynastic Khitan. University of Helsinki. p. 99. quote: "According to Gai Zhiyong's study, Jishou is identical with Qishou, the earliest ancestor of the Khitan; and Shihuai is identical to Tanshihuai, the Xianbei supreme chief in the period of the Eastern Han (25-220). Therefore, from the sentence "His ancestor was Jish[ou] who was derived from Shihuai" in the above inscription, it can be simply seen that the Khitan originated from the Xianbei. Since the excavated inscription on memorial tablet can be regarded as a firsthand historical source, this piece of information is quite reliable."
