The mountains in central Shandong are raised, the southwest and northwest are low-lying and flat, and the east is gentle and hilly. The terrain is dominated by mountains and hills, with Shandong Peninsula in the east, North China Plain in the west and north, and mountains and hills in the south-central, forming a landform with mountains and hills as the skeleton and plain basins staggered, including mountains, hills, platforms, basins, plains, lakes and other types. It spans five major water systems: Huaihe River, Yellow River, Haihe River, Xiaoqing River and Jiaodong. It has a warm temperate monsoon climate.