Archaeological studies support a human presence in the Chek Lap Kok area from 35,000 to 39,000 years ago, and in Sai Kung Peninsula from 6,000 years ago.[20][21][22] Wong Tei Tung and Three Fathoms Cove are the two earliest sites of human habitation in the Palaeolithic period. It is believed the Three Fathom Cove was a river valley settlement and Wong Tei Tung was a lithic manufacturing site. Excavated Neolithic artefacts suggest cultural differences from the Longshan culture in northern China and settlement by the Che people prior to the migration of the Yue people.[23][24] Eight petroglyphs were discovered on surrounding islands dating back to Bronze Age during the Shang Dynasty time period, which are believed to have been used to pacify bad weather