The written Chinese language used from the end of the Han Dynasty (220 CE) to the early 20th century. In Chinese, 文言 (“literary writing”).
The written Chinese language used from the Zhou Dynasty (1045 BCE) (especially the Spring and Autumn Period), through to the end of the Han Dynasty (220 CE). In Chinese, 古文 (“Ancient Writing”). The language of many classics of Chinese literature.
Written Chinese for this entire period, without distinction.