 As early as the fifth century, the charge was made that Guo had plagiarized the work of Xiang Xiu, a close friend of Ji Kang and fellow member of the Seven Worthies of the Bamboo Grove. Xiang Xiu is primarily noted for his work on the Zhuangzi, though he is also known to have written a commentary to the Yijing. According to the Shishuo xinyu (4.17), “Initially, there were scores of Zhuangzi commentators, but none could grasp its meaning and essential teachings. Xiang Xiu then went beyond the old commentaries to interpret the Zhuangzi [afresh]. His explanation was subtle and penetrating, which greatly advanced the cause of the [Learning in the] Profound.” Xiang Xiu’s commentary was incomplete, as the text goes on to relate, and Guo Xiang later “stole” it as his own.