Old Gan (上古贛語, Song-gu Gon-ngi) or Proto-Gan (原始贛語, Ngien-si Gon-ngi) corresponds to the Gan language from the beginning of Qin Dynasty to the latter part of the Han Dynasty.
At the year of 221 BC, the General Tu Sui (屠睢) was sent to the south of China in order to conquer the territory of Baiyue. 500,000 soldiers then settled down at Yugan, Nankang and 3 other places, which formed the initial Chinese population in Jiangxi. In 202 BC, Yuzhang Prefecture (豫章郡) was set up by the Han Dynasty and since then the local population increased rapidly.
- ^ Chen Changyi, Summanry of Gan's dialects
- Wan Bo (萬波), Research on Gan's consonnants (贛語聲母的歷史層次研究)
- Chen Changyi (陳昌儀), Summanry of Gan's dialects (贛方言概要)
- Shao Baiming (邵百鳴) and Ge Lili (葛力力), The formation of Gan's dialects (略論贛方言的形成)