Proto-Mandarin Chinese

Proto-Mandarin
Spoken in China
Region Medieval China
Era Evolved into Mandarin Chinese and possibly other and Chinese dialects
Language family
Sino-Tibetan
Writing system Seal Script, Clerical Script, Kaishu, Semi-cursive script, Grass script, Phagspa, Hangul
Official status
Official language in Song Dynasty
Regulated by No official regulation
Language codes
ISO 639-3

Proto-Mandarin or Late Antiquity Chinese is a term that can be used to designate any earlier form of the most widely-spoken Chinese dialect, known in English as Mandarin; it's the descendant of "late Middle Chinese" in the Song Dynasty. "Early Mandarin" is the common name for the sound system described by the rhyme dictionary Zhōngyuán Yīnyùn (中原音韻, lit. Sounds and Rhymes of the Central Plains) of the later Yuan dynasty, used for rhyming of Zaju (雜劇) of that time.