"Full Tang Text Supplement and Preface to the Epitaph of the Former Helan Governor of the Tang Dynasty (Minzhi)" 402
The epitaph of the late Emperor Helan Mansion of the Tang Dynasty was named Minzhi, named Changzhu, and was from Luoyang, Henan. He preceded Xuanyuan Huangdi and came after him. The capital of Youlan is at the foot of the mountain of the Duke of Helan Kingdom, and his family name is Yan. The ancestor of the fourteenth generation, during the reign of Emperor Huan of the later Wei Dynasty, he was surnamed Zuofu in the north and worshiped General Pingshuo in Xipo. After that, Xuan Mianhe Yi and Guizu won the title again. Wu Mu Wenzhao, Yinhuang (twelve characters) Hou Zhengdai, the general manager of the left and right Li Zhen Mansion, the third division of Yitong of the Shang Kai Mansion, the general of Leiqi, the general, and the minister of the Ministry of Rites of the Sui Dynasty.