Question: Are Nanchang and Heshan, Guangdong located in Southern China?
Context: Nanchang Changbei International Airport (IATA: KHN, ICAO: ZSCN) is an airport serving Nanchang, the capital of Jiangxi province, China.  It is located 28 km north of Nanchang.  Construction began in October 1996 and went into operation on September 10, 1999.  It replaced Nanchang Xiangtang Airport which was a joint civilian and military airport.  It has a runway with a length of 2800 metres and a terminal building with six gates.  As of 2010, it was undergoing an expansion which includes a new terminal and a second runway. The Nanchang–Ganzhou High-Speed Railway is a high-speed railway currently under construction between Nanchang and Ganzhou in Jiangxi province in China.  This forms the northern section of the larger Nanchang-Shenzhen High-Speed Railway.  The southern section of that railway, the Ganzhou–Shenzhen High-Speed Railway, commenced construction in January 2015.  This will eventually allow for fast connections from Jiangxi to several coastal cities in Guangdong and Fujian. Heshan, formerly romanized as Hokshan, is a county-level city of Jiangmen City in the southern part of Guangdong Province, China with a total land area of 1108.3 km2 and a population of 360,000.  If migrants this figure rises to around 550,000 persons residing within the city's borders.  There are approximately 360,000 people of Heshan origin or descent living in other parts of the world. Nanchang Hangkong University (), also Nanchang Aviation University, is located in Nanchang City, Jiangxi Province, People's Republic of China.  It is an engineering-based multidisciplinary university.  It was  Nanchang Institute of Aeronautical Technology  and it was renamed in Feb. 2007.  It is a higher education institute with a distinctive feature of aeronautics and national defense under the joint supervision of Jiangxi Provincial Government and Ministry of Industry and Information Technology of the People's Republic of China. Jiujiang Town () is a town in Nanhai District, Foshan, Guangdong, Southern China.  It covers an area of 94.75 km2 with a registered population of 99,600 and a migrant population of 55,000.  It is an important production base for clothing, electronics, packaging and rice wine in Foshan.  It connects with Heshan by the famous Jiujiang Bridge across the Xi River. Nanchang () is the capital of Jiangxi Province in southeastern China.  s of 2010 , a population of 5,042,565 live in the prefecture, in which 2,357,838 live in the area made up of all five urban districts.  Located in the north-central part of the province, it is bounded on the west by the Jiuling Mountains, and on the east by Poyang Lake.  Because of its strategic location connecting the prosperous East and South China, it has become a major railway hub in Southern China in recent decades. Xiangtang–Putian Railway or Xiangpu Railway (), is a Class I high-speed railway in eastern China linking Nanchang and Fúzhou (福州), the provincial capitals, respectively, of Jiangxi and Fujian Province.  The line is named after Xiangtang, a township south of Nanchang, which was originally slated to serve as a terminus, and Putian, on the coast of Fujian, at which the southern branch of the Xiangpu Railway terminates.  The line actually begins at the Lehua East Station, a rail junction for the Beijing–Kowloon and Nanchang–Jiujiang Intercity Railways north of Nanchang.  The line heads south to Nanchang West Railway Station and bypasses Xiangtang on its way to Fǔzhou (抚州).  After entering Fujian, the line forks at Yongtai with the northern fork heading to Fúzhou (福州) and the southern fork going to Putian.  The Nanchang to Yongtai section of the line plus the northern fork to Fuzhou is officially named the Nanchang–Fuzhou or Changfu Railway.  The southern fork is officially named the Yongtai–Putian or Yongpu Railway. The Pavilion of Prince Teng () or Tengwang Pavilion is a building in the north west of the city of Nanchang, in Jiangxi province, China, on the east bank of the Gan River and is one of the Three Great Towers of southern China.  The other two are the Yueyang Tower and the Yellow Crane Pavilion.  It has been destroyed and rebuilt many times over its history.  The present building was rebuilt in 1989 on the original site.  The rebuilding plan was devised by the architect Liang Sicheng，and now the Pavilion of Prince Teng is the landmark of Nanchang.  There are nine floors in total.  The main architectural structure is in Song dynasty wooden style, showing the magnificence of the Pavilion. Xiangtang (; ] ) is a town located to the south of Nanchang, the capital of China's Jiangxi province, under the administration of Nanchang County It is the most populous town in the province with the population more than 150,000 as of the 2010 census.  The town was established from a village, which is still remaining near the present center of the town, during the Qing Dynasty.  The village experienced fast growth when the main part of the Zhejiang–Jiangxi Railway was completed in 1935.  Nowadays, Xiangtang has two main rail stations: Xiangtang West Station as the second largest freight yard in China and Xiangtang Station as a level-1 passenger station nationwide.  It also had the only civilian airport(joint military/civilian) in Jiangxi province before Nanchang Changbei International Airport went to operation in September 10, 1999. Nanchang Foreign Language School (南昌外国语学校) is a middle and high school located in Nanchang, the capital city of Jiangxi province, China.  Designated by Ministry of Education of the People's Republic of China as one of the only 16 high schools in Mainland China that possess "direct admission” quotas(保送生) to send students directly to universities in China while waiving the National Higher Education Entrance Examination, It is the first council foreign language school in the Jiangxi province and it is also a key school in Nanchang.
Answer: yes