Are both Shuangyashan and Longnan in China?
Shuangyashan: Shuangyashan () is a coal mining prefecture-level city located in the eastern part Heilongjiang province, People's Republic of China, bordering Russia's Khabarovsk and Primorsky krais to the east. Longnan: Longnan (Chinese:  隴南 ,  陇南 , "Lǒngnán",  "Southern Gansu") is a prefecture-level city in the southeast of Gansu province in China.
yes