The first volume of the Tsinghua University Warring States bamboo-strip manuscripts contains a text with passages that match medieval quotations of a text referred to as Cheng Wu 程寤 or Awakening at Cheng, which in turn is said to be a lost chapter of the Yi Zhou Shu 逸周書 or Leftover Zhou Documents. The passages concern one of Chinese literature's earliest interpretations of a dream, and were quoted in medieval encyclopedias in their sections on dreams. This article discusses the significance of this discovery both for Chinese textual history and for the interpretation of this particular dream. In particular, it shows that trees seen in the dream predict the Zhou conquest of Shang, and the subsequent Shang acquiescence to Zhou rule. It also notes that this discovery simultaneously confirms the antiquity of this text, but also calls into question the dominant traditional interpretation of the dream.
