How is Shandong province divided between its inland region and its peninsula?

Shandong province is geographically and economically divided into two distinct segments: an inland zone and the Shandong Peninsula.1

The Inland Zone

Covering approximately two-thirds of the province, the inland region is characterized by a hilly central area centered on the Mount Tai complex. The surrounding north, west, and south areas consist of fertile, intensively farmed agricultural plains that form part of the Huang He basin and the North China Plain. Historically, this region has been closely tied to the inward-facing Chinese empire.1

The Shandong Peninsula

Extending roughly 200 miles seaward from the Wei and Jiaolai river plains, the peninsula is entirely an upland area. Its economy has traditionally focused on fishing, mining, and port-related activities, supported by an indented coastline and a strong seaward orientation. Historically, this eastern region has often sought greater autonomy compared to the inland portion.1

This natural division is further reflected in the province's dual political and economic configurations, balancing the agricultural focus of the interior with the maritime and trade-oriented nature of the peninsula.1