Proper noun
The written Chinese language used from the end of the Han Dynasty (220 C.E.) to the early 20th century. In Chinese, 文言 (wényán, “literary writing”).
The written Chinese language used from the Zhou Dynasty (1045 B.C.E.) (especially the Spring and Autumn Period), through to the end of the Han Dynasty (220 C.E.). In Chinese, 古文 (gǔwén, “Ancient Writing”). The language of many classics of Chinese literature.
Written Chinese for this entire period, without distinction.
Source: en.wiktionary.org