Question: Are Wanding Town and Jiujiang, Guangdong both frontier towns?

full_context: Document 1: Wandu: Wandu, called Hwando in Korean, was the second capital of the Goguryeo kingdom. The remains of the mountain fortress are part of the UNESCO World Heritage Site Capital Cities and Tombs of the Ancient Koguryo Kingdom. It is located 2.5 kilometers west of Ji'an, Jilin province in Northeast China, near the North Korean border. It is part of the UNESCO World Heritage Site Capital Cities and Tombs of the Ancient Koguryo Kingdom, together with nearby Guonei City and the Wunü Mountain City.
Document 2: Mangshi: Mangshi or Mangshi City (; Thai: เมืองข้อน ), formerly named Luxi City (), is a county-level city of Dehong Prefecture, in the west of Yunnan province, People's Republic of China. It is the prefectural seat, and in 1996, Luxi was upgraded to a county-level city.
Document 3: Longjiang, Foshan: Longjiang () is a town in west-central Guangdong province, Southern China. It is under the administration of Shunde District, Foshan City, which lies 15 km to the north-northeast. Bordering towns are Leliu (勒流镇) to the east, Xingtan (杏坛镇) to the south, Lecong (乐从镇) to the north, and Jiujiang of Nanhai District to the west.
Document 4: 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.
Document 5: Zhaoqing: Zhaoqing, formerly romanized as Shiuhing, is a prefecture-level city in Guangdong Province, China. During the 2010 census, its population was 3,918,467, with 1,232,462 living in the urbanized areas of Duanzhou District and Gaoyao County. The prefectural seat—excluding Seven Star Crags—is fairly flat, but thickly forested mountains lie just outside its limits. Numerous rice paddies and aquaculture ponds are found on the outskirts of the city. Sihui and the southern districts of the prefecture are considered part of the Pearl River Delta.
Document 6: Jiujiang: Jiujiang (), formerly transliterated Kiukiang or Kew Keang, is a prefecture-level city located on the southern shores of the Yangtze River in northwest Jiangxi Province, People's Republic of China. It is the second-largest prefecture-level city in Jiangxi province after the provincial capital Nanchang. "Jiujiang" literally means "nine rivers".
Document 7: Wanding Border Economic Cooperation Zone: Wanding Border Economic Cooperation Zone (WTBECZ) is a Chinese State Council-approved Industrial Park based in Wanding Town, Ruili City, Dehong Prefecture, Yunnan, China, founded in 1992 and was established to promote trade between China and Myanmar. The zone spans 6 km sq. and is focuses on developing trading, processing, agriculture resources and tourism.
Document 8: Jiujiang, Guangdong: 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.
Document 9: Heshun Town: Heshun Town () is an ancient town in Tengchong City, located four kilometers southwest of the city centre in Yunnan, China. The town's ancient name is Yangwendun () which was changed to Heshun () and eventually the name it bears today. Heshun is well known for its quadrangle courtyards that have been built into the town's hills.
Document 10: Shiqi Subdistrict: Shiqi Subdistrict or Shiqiqu Subdistrict is located in the center of Zhongshan city and covering an area of 49.72 square kilometers. Kei River is the mother river of Shekki district. The district administers 19 neighborhood committees, and is considered the city's center for commerce and culture. According to a 2006 census, the district had a permanent population of 169,400 and migrant population of 40,900. Shekki District has a national-level private enterprise industrial park—Guangdong Zhongshan Industrial Park. Furthermore, the district has currently 20 commercial networks, such as major marketplaces, logistic centers, and shopping malls. One study in 2006 finds credits the district with 11767 business enterprises.
Document 11: Wangjing, Manipur: Wangjing is a town and a municipal council in Thoubal district in the Indian state of Manipur. It is about 6 km from district headquarters and an agricultural town in Thoubal district in the Indian state of Manipur. It is bordered by Heirok village in the east, Tentha village in the south-west, and on the other side by agricultural land. Wangjing River, a rivulet flowing down from the eastern hills, runs through the middle of the town, serving as a natural spring. It is connected to other parts of the state by the Imphal-Moreh national highway. It is the junction between Heirok and Tentha village.
Document 12: Wanding Town: Wanding Town, also known as "Wandingzhen" and "Wanting" (畹町镇; meaning in Tai Nüa language: "the sun shining overhead"), is a frontier town in Ruili City, Dehong Prefecture, Yunnan Province, China.
Document 13: Matupi: Matupi (Batupuei) is the second capital city, one of the townships of Chin State of West Myanmar, south-east Asia. There are four Chin major tribes living in the Matupi township such as Matu, Mara, Zotung, Lautu and Khumi. Matupi, formerly known as Batupuei or Batu Village before it was promoted to the status of township, occupies a large portion of land and includes over 100 major villages in the southern part of Chin State. According to some local experts from Ngala tribe, the name "Matupi" is derived from "Batupuei" (Badupi); however, due to misreading of the spellings: "Ba" into "Ma" and "Puei" into "Pi" in Burmese characters, but this theory is keep in discussion. Matupi appeared to be the widely used name without any historical significance in its terminology. The Matupi (Chin) tribe is one of the biggest tribes among the Kuki-Chin-Mizo. From the very beginning all the Chins including Kuki, Mizo, Zomi, Naga, Laimi, and Asho, Kcho and Khumi had lived on hillsides or riverbanks, constituting villages or groups. Among the villages, Matupi (formerly known as Batu Village) was the biggest and most populous. The "British Gazette" mentioned that there were over 1,000 houses including paddy barns in the village Batupuei in the period between 1900 and 1930. Hakha book recorded that during those days “Matupi” was the biggest and most populous village in the Chin Hills.
Document 14: Jiujiang Yangtze River Bridge: The Jiujiang Yangtze River Bridge is a combined road-rail bridge over the Yangtze River near the city of Jiujiang, Jiangxi Province in eastern China. It links Xunyang District of Jiujiang, south of the river, with Xiaochi Town in Huangmei County, Hubei Province, to the north. The central section of the bridge uses a combined arch and truss structure and the bridge is one of the longest continuous truss bridges in the world, with a longest span of 216 m and a total truss length of 1314 m =3x162+180+216+180+2x126. The double deck bridge carries four vehicular lanes and two sidewalks on the top deck and two railway tracks on the bottom deck.
Document 15: Guicheng Subdistrict, Foshan: Guicheng Subdistrict () is a subdistrict of the Nanhai District Foshan, Guangdong, China covering an area of 84.16 km2 . The subdistrict has a registered population of 186,000 and floating population of 280,000 and is the location of the Nanhai District Government, as well as being the political, economic and cultural centre of Nanhai.
ground_truth: no