Is southern Liaoning a hilly or mountainous area?

It is hilly.

Liaonan was formerly known as the "Land of Guanwang". In a narrow sense, it specifically refers to Dalian, but in a broad sense, it also includes Yingkou City, Anshan City, and Dandong City. Its territory covers most of the Liaodong Peninsula. Specifically, "Liaonan" mainly includes: Dalian City, and Pulandian, Wafangdian, Zhuanghe, Changhai, Jinzhou, and Lushun under the jurisdiction of Dalian City; Yingkou City, and Dashiqiao and Gaizhou under the jurisdiction of Yingkou City Dandong City and its jurisdictions include Donggang City, Fengcheng City, and Kuandian Manchu Autonomous County; Anshan City and its jurisdiction over a dozen counties and cities including Haicheng City and Xiuyan Manchu Autonomous County. In ancient times, there was a saying that "the Jin Dynasty restored the sea cover, and Liaoyang was outside". In 1965, the country established the Liaonan exclusive zone. It is the main radiation belt of the "Liaohai Culture" area (the "Liaohai Weiyi" monument in the God's Temple in Gaixian County). During the Three Kingdoms period, scholars from Shandong such as Guan Ning (who lived in seclusion in Guan Ningtun, Haicheng) and Wang Lie (who lived in seclusion on Sanshan Island in Dalian) came to Liaonan to live in seclusion and give lectures. The customs and education here were very different from those in other areas of Guanzuo, so later generations called it "Guan Ning". The land of kings”. And because the peninsula has been rich in apples since modern times, it is also known as the "Hometown of Apples". This place is also known as the "Oriental Gentleman's Country". Most of the ancestors of the Liaonan people were Shandong immigrants from "Little Yunnan" and "Hainan Diu'er". The customs and education of the Han nationality were so deeply rooted that it was difficult to assimilate with the Manchus in the early Qing Dynasty.