 Like He Yan, Wang Bi focuses on the concept of “nothingness” (wu) in his explication of Dao. For He Yan, the nothingness of Dao bespeaks its undifferentiated fullness. Wang Bi, however, holds a different view. The argument from Dao’s completeness cannot explain fully the mystery of Dao, according to Wang. This is because it fails to resolve the problem of infinite regress. If the chain of beings were to be traced to a specific agent or entity, the origin of the latter must itself be questioned. What gives rise to the category of beings cannot be a being, no matter how powerful or fecund, with or without differentiated features. Taken to its logical conclusion, the argument cannot be that wu marks the incomparable being of the Dao; rather, as Wang Bi states explicitly, “Dao” serves but as “the designation of wu” (commentary to Lunyu 7.6, cf. commentary to Laozi 25).