자치통감
The "Xu Zizhi Tongjian Changbian" ("Long compilation of the continuation of the "Zizhi Tongjian""), a book covering the period of 960–1126 and written 40 years or so later by Li Tao (1114–1183), contains the oldest Chinese testimonies relating to the observation of the star. It was rediscovered in 1970 by the specialist in Chinese civilisations Ho Peng Yoke and collaborators.