Human habitation in Shenzhen dates back to ancient times. The earliest archaeological remains so far unearthed are shards from a site at Xiantouling on Mirs Bay, dating back to 5000 BC. In the year 331 AD, six counties covering most of modern south-eastern Guangdong were merged into one province or "jun" named Dongguan Jun with its centre at Nantou. Shenzhen was also involved in the events surrounding the end of the Southern Song Dynasty (1276-79). The Imperial court, fleeing Khubilai Khan's forces, established itself in the Shenzhen area and the last Emperor died strapped to the back of his chief Minister who preferred suicide to the possibility of the Emperor being captured and bringing shame to the dynasty. In the late 19th century the Chiu or Zhao clan in Hong Kong identified the Chiwan area as the final resting place of the Emperor and built a tomb to him. The tomb, since restored, is still in Chiwan. Earliest known ancient records that carried the name of Shenzhen date from 1410 during the Ming Dynasty.