An old lady from Anqing City, Anhui Province, standing next to the river says that the wastewater is always there, sometimes the color is black, sometimes is red, and always smelly, but it's not known from which chemical plant it comes from. 

安徽安庆市在市政干道养护所看门的大妈说：这里的污水一直都在流，有时是黑色的，有时是红色的，很臭，但不知道从哪个工厂流出来的。