Recent research at Liangzhu in China documents the settlement as a fortified town dating from 3300–2300 BC, accompanied by an impressive system of earthen dams for flood control and irrigation. An earthen platform in the centre of the town probably supported a palace complex, and grave goods from the adjacent Fanshan cemetery include finely worked jades accompanying high-status burials. These artefacts were produced by a complex society more than a millennium before the bronzes of the Shang period. The large-scale public works and remarkable grave goods at Liangzhu are products of what may be the earliest state society in East Asia.