The Qinling–Huaihe Line is a reference line used by geographers to distinguish between northern and southern China, corresponding roughly to the 33rd parallel. Qinling refers to the Qin Mountains, and Huaihe refers to the Huai River. Running from Qin Mountain in the west to Huai River in the east, it divides eastern China into northern and southern regions that differ from each other in climate, culture, lifestyle, and cuisine.