Where did the Yangshan Campaign in the Huai Hai Campaign take place?

Yangshan is located in Yangshan Town, Jinxiang County, Shandong Province in the southwest of Shandong Province. It used to be a Jishan, located at the southwest of Mapingchuan 100 kilometers. Although the height of Yangshan in memory (1970s and 1980s) is only a few hundred meters (it should be less than 200m), it can be seen shining in the sun in sunny days and dozens of kilometers away.