The content cited in the book. Collated and revised into a single chapter, with appended textual variants (Kao Yi). The preface states: During the Kanpyo era, Fujiwara no Sukeyo presented a bibliography which listed *Huangdi Bashi Yi Nan Jing* (Yellow Emperor's Eighty-One Difficult Issues) as nine volumes, annotated by Yang Xuancuo. *Bashi Yi Nan Yin Yi* (Phonetics and Semantics of the Eighty-One Difficult Issues) as one volume, authored by the same person. Zhao Xibian, in his *Dushu Zhi* (Record of Reading), stated that *Huangdi Bashi Yi Nan Jing* consists of one volume, authored by Qin Yueren, annotated by Lu Guang of the Wu state, and expounded upon by Yang Xuancuo of the Tang dynasty. Ma Duanlin, in his *Wenxian Tongkao* (Comprehensive Examination of Literary Remains)...