The Austronesians in Việt Nam I

 The Austronesians are represented in Việt Nam by the Chamic speakers. These languages have undergone extreme restructuring under the influence of Austroasiatic and they were not immediately recognised as Austronesian The exact period of Austronesian incursions into Việt Nam cannot be dated, but it was presumably before 0 AD, to account for the rise of the Champa kingdom, which dominated this region in the early medieval period and may represent the first written examples of an Austronesian language  The Aceh of Sumatra are thought to represent a remigration of Chamic back into the Austronesian-speaking area, while Tsat, on Hainan island into the Sinitic area. The founders of the Utsat community probably fled to Hainan after break-up of the Cham Empire.