Old Gan (,
Song-gu Gon-ngi) or Proto-Gan (原始贛語,
Ngien-si Gon-ngi) was spoken between the beginning of the
Qin dynasty to the latter part of the
Han dynasty. In the year of 221 BC, General Tu Sui () was sent on behalf of the Qin dynasty to the south of
China in order to conquer the territory of
Baiyue. 500,000 soldiers then settled down at
Yugan,
Nankang and three other places. This formed the initial Chinese population in
Jiangxi. In 202 BC, Yuzhang Prefecture () was set up by the Han dynasty. Following this, the local population increased rapidly. ==Late Old Gan==