Book of Zhou
The Yi Zhou Shu () is a compendium of Chinese historical documents about the Western Zhou period (1046–771 BCE). Its textual history began with a (4th century BCE) text/compendium known as the "Zhou Shu" ("Book of Zhou"), which was possibly not differentiated from the corpus of the same name in the extant "Book of Documents". Western Han dynasty (202 BC-AD 9) editors listed 70 chapters of YZS, of which 59 are extant as texts, and the rest only as chapter titles. Such condition is described for the first time by Wang Shihan 王士漢 in 1669. Circulation ways of the individual chapters before that point (merging of different texts or single text's editions, substitution, addition, conflation with commentaries etc.) are subject to scholarly debates (see below).