It derives its name from a breast-shaped hill on the seashore. In the Shandong Peninsula, there are many mountains named as "YU", for example, Kun Yu Mountain and Ju Yu Mountain. Therefore, "YU" may mean "mountain" in the ancient Dongyi language.
The city has a long history. The first county was founded in 206 B.C. and named "Yuli".
Geography and climate
It is located on the south-eastern seashore of Shandong Province in China at 36°7′ northern latitude and 121°5′ east of Greenwich.
Rushan has a mild, seasonal climate moderated by the Yellow Sea. August is the warmest month with a 24-hour average temperature of 23.5°C and January the coldest with 24-hour average temperature of 0°C.