Question: how is Sanshui District and Rushan, Shandong connected?

Context paragraphs:
Yazi: Yazi () is a town in Rushan, Weihai, in eastern Shandong province, China.

Zhuwang: Zhuwang () is a town in Rushan, Weihai, in eastern Shandong province, China.

Xiachu: Xiachu () is a town in Rushan, Weihai, in eastern Shandong province, China.

Dalangshan Formation: The Dalangshan Formation () is a geological formation in the Sanshui District of Guangdong Province, China, the strata of which date back to the Late Cretaceous period.

Rushan, Shandong: Rushan is a county-level city in the prefecture-level city of Weihai, Shandong province, People's Republic of China.  Rushan borders Yantai to the north and looks out to the Yellow Sea to the south.

Xinan Subdistrict, Foshan: Xinan () is a subdistrict of the Sanshui District, Foshan, Guangdong, China.

Nanhuang: Nanhuang () is a town in Rushan, Weihai, in eastern Shandong province, China.

Sanshui District: Sanshui District, formerly romanized as Samshui, is an urban district of the prefecture-level city Foshan in Guangdong, China.  It had about 386,000 inhabitants in 2002.  It is known for the "Samsui women", emigrants who labor in Singapore, and for a large fireworks explosion in 2008.

Rushanzhai: Rushanzhai () is a town in Rushan, Weihai, in eastern Shandong province, China.

Xujia, Shandong: Xujia () is a town in Rushan, Weihai, in eastern Shandong province, China.

Supporting paragraphs: Sanshui District Rushan, Shandong
Answer: China