Longnan (Chinese:  隴南 ,  陇南 , "Lǒngnán",  "Southern Gansu") is a prefecture-level city in the southeast of Gansu province in China.
 It borders Sichuan on its south and Shaanxi on its east.
Jiezhou or Jie Prefecture (階州) was a "zhou" (prefecture) in imperial China in modern Longnan, Gansu, China.
 It existed (intermittently) from 892 to 1913.
Sanhe () is a town of Wudu District, Longnan, Gansu, People's Republic of China, located 23 km southeast of downtown Longnan as the crow flies.
 , it has 16 villages under its administration.
The West Qinling Tunnel () is in the middle of the Chongqing–Lanzhou Railway (), crossing the Qinling Mountains.
 It is a 28236 meter dual-bore railway tunnel in Wudu District, Longnan City, Gansu Province, north-west China.
 It is the second longest railway tunnel in China, slightly shorter than the New Guanjiao Tunnel, which is also under construction.
 The construction started on August, 2008, and has gone on for duration of about five months and five years using both Tunnel boring machines (TBM) and drill and blast methods.
The Battle of Mount Qi was a military conflict which took place around Mount Qi (祁山; the mountainous regions around present-day Li County, Longnan, Gansu) between the states of Cao Wei and Shu Han in 231 during the Three Kingdoms period in China.
 It was also the most vigorous campaign of the five expeditions Shu launched against Wei, resulting in thousands of deaths on both sides.
 After this campaign ended with Wei as the victor, the Shu chancellor-regent Zhuge Liang spent three years recuperating before launching another assault on Wei in 234.
Longnan Chengzhou Airport () is an airport scheduled to be constructed to serve the city of Longnan in southern Gansu Province of China.
 It is located 10 kilometers from the seat of Cheng County, which is under the administration of Longnan city.
 The airport received approval from the State Council of China in July 2012.
 It is expected to cost 1.2 billion yuan to build.
Longnan Railway Station () serves Longnan County in the city of Ganzhou in Jiangxi province, China.
 Six trains pass through the station every day.
The 2008 Longnan riot was a protest that turned into a riot involving thousands of people in Longnan, Gansu, People's Republic of China.
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.
 The city's name means a pair-of-ducks mountains and refers to two peaks northeast of the city.
 In 2007 it had a GDP of RMB 20.6 billion with a 14.2% growth rate.
Longtou () is a town in Baoqing County, in southeastern Heilongjiang province, China.
 , it has 10 villages under its administration.
 The town is located about 23 km south-southwest of the county seat, Baoqing Town (宝清镇) and more than 90 km southeast of Shuangyashan city proper.

Question: Are both Shuangyashan and Longnan in China?
Answer: yes