 Jinjiang - and most of the central Jiangsu region - is situated on the Yangtze River's alluvial plain.The terrain here is generally very flat.A small isolated hill, located some 6 km north of the Yangtze, is the only hill within a large area; for this reason the hill has become a well-known topographic feature in the region, received its name, "Lonely Hill" (Gushan).