Is there a difference between the two campuses of Zhushan Middle School?

Yes According to official website of Zhushan Middle School.

1, the difference in area, Zhushan Road Campus covers an area east of Qinhuai River, south of Wenjing West Road-Wenjing Road (including teachers' new residence), Donggou Lane-Fuge Road-Qinhuai Middle School-Ningzhong Lane-Xinyi Road-Jiangning Hospital Gushan Road Campus-Jiangning Sports Park-Jinbo Road-Rhine Road, and north of Tianyuan East Road. Hudong Road Campus is located in the east of Tiantuo Road-Zhushan Road, south of Nanjing Ring Expressway, west of Yin Tian Avenue and north of Fangshan.

2. Regional differences: Zhushan Road Campus is located in Zhuxin Road, Dongshan Street, Jiangning District, Nanjing, while the other Hudong Road Campus is located in Hudong Road, Jiangning District, Nanjing.