Classical Chinese grammar is the grammar of Classical Chinese, a term that first and foremost refers to the written language of the classical period of Chinese literature, from the end of the Spring and Autumn period (early 5th century BC) to the foundation of the Qin Dynasty (221 BC), or in a broader sense, to the end of the Han Dynasty (AD 220). The term "Classical Chinese" is also often used for the higher language register used in writing during most of the following centuries (a register generally referred to by sinologists as "Literary Chinese"); however, this article focuses on the grammar used in the classical period.