that Murong Wei often sang it until he died and the song got spread into central and northwest China. The Murong Xianbei whom he had led successively founded the Former Yan (281-370), Western Yan (384-394), Later Yan (383-407), and Southern Yan (398-410). Their territories encompassed, at their height, the present Liaoning, Inner Mongolia, Shandong, Shanxi, Hebei, and Henan, and their capitals included Beijing and other cities. Through these establishments, they were immersed among the Chinese, whereas the Xianbei who followed Tuyühu Khan preserved their language and culture. Mt. Xianbei In the extensive migrations that the Xianbei undertook in the northeast, northern, and northwest China, the name of Mt. Xianbei was found along their trajectories. The earliest recorded Mt. Xianbei was in the southern portions of Daxinganling, located in northeast Inner Mongolia, which represented the originating place of the Xianbei. Two Mt. Xianbei were recorded subsequently in western Liaoning: one in the present Jinzhou City and one near Yi County. Another Mt. Xianbei was recorded in the northern portions of Daxinganling, located near Alihe Town of Oroqin Autonomous Banner in Hulunbeiermeng in the northeastern portion of Inner Mongolia that borders eastern Russia. The Gaxian Cave, currently Khabarovsk and Amur regions in the Russian Far East, which had stone inscriptions of the Northern Wei emperor dated 443, was recognized to be the sacred ancestral shrine of the Xianbei. In the northwest, the Qilian Mountains that run along Gansu and Qinghai provinces were referred to as the Greater Mt. Xianbei. In Sanchuan/Guanting of Minhe County in Qinghai, which holds the most densely populated Monguor settlement, Mt. Xianbei stands in the west, upon which sits the ancestral shrine of the Xianbei Khans. Tuyuhun Empire After Tuyühu Khan died in Linxia, also known as Huozhou, Gansu in 317, his sixty sons inherited to further develop the empire, by annihilating the Western Qin (385-430), which had annexed Southern Liang (396-414) earlier, and Haolian Xia (407-431) kingdoms, from which the Qinghai Xianbei, Tufa Xianbei, Qifu Xianbei and Haolian Xianbei joined them. These Xianbei groups formed the core of the Tuyuhun Empire and numbered about 3.3 million at their peak. They carried out extensive military expeditions westward, reaching as far as Hetian in Xinjiang and the borders of Kashmir and Afghanistan, and established a vast empire that encompassed Qinghai, Gansu, Ningxia, northern Sichuan, eastern Shaanxi, southern Xinjiang, and most of Tibet, stretching 1,500 kilometers from the east to