Question: What country are both Yiyang and Chongzuo located in?

full_context: Document 1: Fangchenggang: Fángchénggǎng (; Vietnamese: "Phòng Thành Cảng" ), formerly Fangcheng Various Nationalities Autonomous County (1978.12.25~1993.05.23), is a prefecture-level city in the south of Guangxi Zhuang Autonomous Region, People's Republic of China.
Document 2: Yichun, Heilongjiang: Yichun () is a prefecture-level city on the Songhua river in Heilongjiang province, People's Republic of China. The city is separated from Russia by the Amur River and has an international border of 246 km . At the 2010 census, Yichun has a total population of 1,148,126 while 729,202 people live in 15 districts separated by forests. The greening rate of Yichun is up to 83%. The nickname of Yichun is Lindu ().
Document 3: Xiangyang: Xiangyang () is a prefecture-level city in northwestern Hubei province, People's Republic of China. It was known as Xiangfan () until December 2, 2010. Xiangyang is divided by the Han River, which runs through its heart and divides the city north-south. The city itself is an incorporation of two once separate, ancient cities: Fancheng and Xiangzhou. What remains of old Xianyang is located south of the Han River and contains one of the oldest still-intact city walls in China while Fancheng was located to the north of the Han River. Both cities served prominent historical roles in both the Ancient and Pre-Modern Periods of Chinese history. Today, the city is, after the capital Wuhan, the second largest in the province, located about halfway between Wuhan and Xi'an. It is considered one of the third tier cities in China and has been a target of government and private investment as the country seeks to urbanize and develop the interior provinces.
Document 4: Chongzuo: Chóngzuǒ (; Zhuang: Cungzcoj ) is a prefecture-level city in the south of Guangxi Zhuang Autonomous Region along the Sino-Vietnamese border. It is home to one of China's largest Zhuang populations.
Document 5: Dongxing, Guangxi: Dongxing (,"Vietnamese": Đông Hưng) is a county-level city of Guangxi, People's Republic of China, on the border with Mong Cai of Vietnam.
Document 6: Shaoyang: Shaoyang () is a prefecture-level city in southwestern Hunan province, People's Republic of China, bordering Guangxi to the south. Shaoyang has a history of 2500 years and remains an important commercial and transportation city in Hunan. It has a city area and 8 suburban counties, with a population of 7.6 million, the largest in Hunan province.
Document 7: Hezhou: Hezhou (贺州 ) is a prefecture-level city in the northeast of the Guangxi Zhuang Autonomous Region, People's Republic of China.
Document 8: Dongxing, Huanjiang County: Dongxing (; Zhuang: Dunghhingh Zen) is a town under the administration of Huanjiang Maonan Autonomous County, Guangxi, China, located in the northeast of the county. The town itself is inhabited mainly by Zhuang People but there are also sizable amounts of Yao, Miao and Sui while the town previously hold a township status.
Document 9: Taoyuan County: Taoyuan County () is under the administration of Changde, Hunan province, China. The Yuan River, a tributary of the Yangtze, flows through Taoyuan. It covers an area of 4441 square kilometers, of which 895 km2 is arable land. It is 229 km from Zhangjiang Town, the county seat, to Changsha, the capital city of Hunan province. The county occupies the southwestern corner of Changde City and borders the prefecture-level cities of Zhangjiajie to the northwest and Huaihua to the southwest.
Document 10: Huaihua: Huaihua () is a prefecture-level city in the south western Hunan, China. it covers 27,564 km2 and is bordered by Xiangxi to the northern west; Zhangjiajie, Changde to the north; Yiyang, Loudi and Shaoyang to the east; Guilin and Liuzhou of Guangxi to the south; Qiandongnan, Tongren of Guizhou to the southern west. It has 4,741,948 of population (2010 census), shares 7.22% of the province. According to 2010 Census, there are 2,909,574 Han Chinese, Han shares 61.4% of the population, 1,832,289 population of minorities, 38.6%; Dong, Miao, Tujia, Yao and Bai are major native minorities. Huaihua is the central region of Dong ethnic population, there lives 816,481 Dong people (2010 census), it shares 28.35 per centage of Chinese Dong ethnic group.
Document 11: Miluo City: Miluo () is a county-level city in Hunan province, China, it is under the administration of Yueyang Profecture-level City. The city is located on the northeast of the province and on the eastern bank of the Xiang River, it is to the north of the city proper of Changsha City. Miluo is bordered to the north by Yueyang County, to the east by Pingxiang County, to the south by Changsha County and Wangcheng District of Changsha City, to the west by Xiangyin County and Yuanjiang City. Miluo covers an area of 1,669.8 km2 , as of 2015, it had a permanent resident population of 668,156. The city has 3 subdistricts and 10 towns under its jurisdiction. the government seat is Guiyi (归义镇).
Document 12: Yiyang: Yiyang () is a prefecture-level city on the Zi River in Hunan province, People's Republic of China, straddling Lake Dongting and bordering Hubei to the north. According to the 2010 Census, Yiyang has a population of 4,313,084 inhabitants residing in an area of 12,144 km2 . The previous census was in 2000 when it was recorded there were 4,309,143 inhabitants.
Document 13: Yong-Xun Yue: Yong–Xun (Jyutping: Jung cam, 邕潯方言), is a western branch of Yue Chinese spoken in some cities and towns in Guangxi province, including Nanning, Yongning, Guiping, Chongzuo, Ningmin, Hengzhou, Baise, etc. This branch originates from Guangfu Yue and is therefore close to Standard Cantonese. It also absorbed some phonemes and words from the local languages Pinghua and Zhuang.
Document 14: 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 15: Changsha: Changsha (tsã13 sɔ33 sɿ21 ; ) is the capital of Hunan province, south central China. It covers 11,819 km2 and is bordered by Yueyang and Yiyang to the north, Loudi to the west, Xiangtan and Zhuzhou to the south, Yichun and Pingxiang of Jiangxi province to the east. According to 2010 Census, Changsha has 7,044,118 residents, constituting 10.72% of the province's population.
ground_truth: China