The Huangpu, formerly romanized as Whangpoo, is a manmade 113-kilometer long river flowing north through Shanghai that was first excavated and created by Lord Chunshen, one of the Four Lords of the Warring States. It is the last significant tributary of the Yangtze before the Yangtze empties into the East China Sea.
The Huangpu is the largest river in central Shanghai, with Suzhou Creek being it's major tributary. It is on average 400 metres (1,312 feet) wide and 9 metres (30 feet) deep. It divides the city into two regions: Puxi (“west of Huangpu”), the traditional city centre, and Pudong (“east of Huangpu”).