The Huangpu River is a tributary of the lower reaches of the Yangtze River, the longest and widest dry river in Shanghai today, so it is known as the "Shanghai Mother River". It is an important waterway in Shanghai, China. The Yangtze River is injected into Wuxukou, the last tributary before the Yangtze River enters the sea. It flows through the city of Shanghai, dividing Shanghai into Puxi and Pudong.