The central tenet of their approach was that the history of Chinese antiquity was created iteratively. Ancient texts have been repeatedly edited, reorganised, tampered with or even completely fabricated, so the historical narrative of antiquity as presented in traditional texts was different at different points of time. As time went on, the history of antiquity became longer and more complicated, characters acquired more features, including more supernatural attributes. This means that it is not always possible to identify the “authentic” version of events from antiquity, only the narrative as stated in a text at a particular time.

Source: Doubting Antiquity School – Wikipedia