Old Gan (上古贛語, 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 [REF].
In the year of 221 BC, General Tu Sui (屠睢) was sent on behalf of the Qin dynasty to the south of China in order to conquer the territory of Baiyue.