It was also the name of one of the Nine Provinces in ancient China, where Yu combated floods by water control.

In the early Paleozoic, the horizon was in a state of slow decline, with large-scale transgression, and the deposition of thick shallow sand shale and carbonate rock formations.

Several layers of coal; the two rocks are mainly grayish white, dark gray sandstone and variegated mudstone and brown shale, rich in plant fossils.

The Mesozoic Jurassic rocks are mainly brown sandstone, conglomerate, variegated mudstone and glutenite.

Yanzhou District is located in the sloping plain of the southwestern part of the Mount Tai in the Luzhong Mountains.

The northeast is affected by the structure and is a shallow buried area of the Tertiary, with a large slope on the ground.

The hills in the territory belong to the bedrock of the Mount Tai hidden under the Quaternary cover.

2012 GDP reached 50.62 billion yuan, up 13.1 percent; local fiscal revenue 3.008 billion yuan, an increase of 22.65%; major economic indicators higher than the provincial average, income growth higher than the GDP growth rate of urban and rural residents.

The value added of the service industry accounted for 38.7%, an increase of 0.5 percentage points over the same period of the previous year.

The per capita GDP of the region reached 113,217 yuan (converted to an annual average exchange rate of 16,769 US dollars), which was 6.2% higher at comparable prices.