Is there a relationship between Southern Rare Earth Group and Jiangxi Copper?

It doesn't matter.

Southern Rare Earth Group is formed by China Aluminum, China Northern Rare Earth, Xiamen Tungsten, China Minmetals, Guangdong Rare Earth and China Southern Rare Earth. Jiangxi Copper is the largest copper product production base in China. Although Jiangtong also has its own rare earth production company in Sichuan, the rare earth mining in seven southern provinces has little to do with Jiangtong.