Ancient vernacular is a written language formed on the basis of northern dialects after Tang and Song Dynasties. For example, Bianwen in the Tang Dynasty, Dunhuang popular literature works, Song scripts, Jin and Yuan operas and Ming and Qing novels are all representatives of ancient vernacular. Although ancient vernacular Chinese is vernacular Chinese, it is different from the vernacular Chinese we speak today. Generally speaking, it is mainly spoken, mixed with some classical Chinese elements. Even the spoken language is not so easy to understand today because of the differences between regions and times, so we call it "ancient vernacular"
For example, Romance of the Three Kingdoms is an ancient vernacular novel with concise language. Just pick two paragraphs and have a look.
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