River Gipping
The River Gipping is the source river for the River Orwell in the county of Suffolk in East Anglia, England, which is named from the village of Gipping, and which gave its name to the former Gipping Rural District. The name is unrelated to the name of Ipswich. It rises near Mendlesham Green and flows in a south-westerly direction to reach Stowmarket. From there it flows towards the south or south east, passing through Needham Market and a number of villages to reach Ipswich, where it becomes the Orwell. The river has supplied power to a number of watermills, several of which are still standing. None are operational, although the mill at Baylham retains most of its machinery, and is the only complete mill on the river.
Gaoping
The hilly area around Gaoping is known as the Sheep's Head Mountains (), and it is this area that preserves the most concrete evidences of Yan's habitation there. A local temple to a female river spirit has been identified as portraying Yan's daughter Nüwa () - not to be confused with the goddess Nüwa () - since the Ming Dynasty. Ancient sources, such as the Guo Yu, record that Yan and his posterity flourished in the area around a river called the "Giang [Jiang] Water". The river is believed by scholars to be the Giang River of old is now called the Jiang River () or the Jiang Water (), and is located in Tunliu County, whence it flows east into the Zhang River.