While Gu Jiegang uses the example of Yu 禹, Yao 堯, and Shun 舜, he clearly intends this to be a general argument for the early Chinese corpus at large. On the figures Boyi and Shuqi, Gu Jiegang even suspected that they may be fictional altogether, or, if they had actually existed, that the dramatic details of their story such as their suicides must have been fictional inventions from later periods. See Gu Jiegang, "Lun Yao Shun Boyi shu" 論堯舜伯夷書, Gushibian, Volume 1, 43-44. This argument is also reiterated more recently in Poo, "The Formation of the Concept of Antiquity in Early China."