[Textual research on the author of Ji feng pu ji fang (Jifeng's Formularies for universal relief)].

As a medical book of the Song dynasty, there are marks of "re-collating and checking" at the head of each subject at each volume in Ji feng pu ji fang (Jifeng's Formularies for Universal Relief), thus, the book was mistakenly attributed to Zhang Rui. Based on the time characteristics, case records, medical affairs, avoidance of emperor's name, and the original draft, it should be written during the Yuanfeng reign and published during the Gaozong emperor of the Southern Song dynasty. By carefully analyzing the medical lives of Sun Zhao, who died at the end of Yuanfeng reign, Sun Zhao should be its real author, whereas Zhang Rui, who was still alive in the Shaoxing reign of the Southern Song dynasty, was not its author. The research into the medical affairs and birth date of Chu Yushi and Dong Ji's Jiao qi zhi fa zong yao (Essential for Treating Beriberi) provides a powerful evidence for this conclusion.