吴淞江
Wusong is named for the Wusong River, a former name for Shanghai's Suzhou Creek. Suzhou Creek is now a tributary to the Huangpu River, emptying into it in Puxi across from Lujiazui and just north of the Bund. The Huangpu had previously been a tributary to the Wusong, but the two reversed their importance when a flood caused it to gain a number of the Wusong's former tributaries. The location where the Huangpu and Wusong meet was generally known as "Wusongkou" ("mouth of the Wusong").