Question: Longchang and Xuanhua District, are located in which country?

full_context: Document 1: Changchun: Changchun () is the capital and largest city of Jilin Province, and is located in the northeast of China. Lying in the center of the Songliao Plain, Changchun is administered as a , comprising 7 districts, 1 county and 2 county-level cities. According to the 2010 census of China, Changchun had a total population of 7,674,439 under its jurisdiction. The city's urbanized ("or metro") area, comprising 5 districts and 4 development areas, had a population of 3,815,270 in 2010 as the Shuangyang and Jiutai districts are not urbanized yet.
Document 2: Xinghua Subdistrict, Dalian: Xinghua Subdistrict () is a subdistrict of Ganjingzi District, Dalian, People's Republic of China, located to the east of Dalian Zhoushuizi International Airport. , it has 13 residential communities (社区) under its administration.
Document 3: Xugezhuang: Xugezhuang is a former village (Chinese: 胥各莊 , 胥各庄 , "Xūgèzhuāng") and modern town (胥各庄镇 , "Xūgèzhuāng Zhèn") of Fengnan District in Hebei, China.
Document 4: Handan: Handan () is a prefecture-level city located in the southwestern part of Hebei province, China. It borders Xingtai on the north, and the provinces of Shanxi on the west, Henan on the south and Shandong on the east. At the 2010 census, its population was 9,174,683 inhabitants whom 2,845,790 lived in the built-up ("or metro") area made of 3 urban districts, Handan and Yangyan counties, and Shahe City in Xintai municipality, largely being conurbated now.
Document 5: Xinzhou: Xinzhou () is a prefecture-level city occupying the north-central section of Shanxi province, People's Republic of China.
Document 6: Longchang: Longchang(） is a county-level city of Sichuan Province, China. It is under the administration of Neijiang city. Longchang has a population of nearly 760,000, covering 794.41 square kilometer.
Document 7: Mianyang: Mianyang () is the second largest prefecture-level city of Sichuan province in Southwest China. Its population was 5.45 million in 2015 covering an area of 20281 km² consisting of Jiangyou, a county-level city, six counties and two urban districts. Its built-up ("or metro") area was home to 1,722,133 inhabitants including the city proper of Mianyang ("two urban districts") and An County largely being conurbated as urbanisation sprawls. In 2006, Mianyang was ranked as China's third "most suitable city for living" by "China Daily", after coastal cities Dalian and Xiamen., but it has since dropped out of the top 10.
Document 8: Guangchang County: Guangchang County lies in the municipal region of Fuzhou (抚州), Jiangxi. It is the southernmost and most remote of Fuzhou's ten counties, being bordered by counties in Ganzhou to the south and west and, to the east and over the watershed and provincial border, by Jianning and Ninghua Counties, Sanming, FJ. It is the birthplace of he second largest river in Jiangxi: Fuhe. This county built in the Southern Song Dynasty Shaoxing eight years (1138), because the rich white lotus, known as "the hometown of Chinese White Lotus." County has width of 45 km from west to east, 55 km long from north to south. The total area is 1612 square kilometers, with a population of 240,000 in 2003.
Document 9: Langzhong: Langzhong is a county-level city in northeastern Sichuan, China, located on the middle reaches of the Jialing River. It is administered as part of the prefecture-level city of Nanchong. Langzhong has a total population of 840,000, with 200,000 residing in the urban area.
Document 10: Longchuan County, Guangdong: Longchuan County (postal: Lungchun; ) is a county of northeastern Guangdong province, China, bordering Jiangxi to the north and on the upper reaches of the Dong and Han Rivers. It is under the administration of Heyuan City, and in 2004 had a population of 870,000 living in an area of 3089 km2 . Bordering county-level divisions are Xingning and Wuhua County to the east, Heping County and Dongyuan County to the south and west, and in Jiangxi, Dingnan County and Xunwu County to the north.
Document 11: Xuanwei: Xuanwei (Chinese: 宣威; Pinyin: Xuānwēi) is a county-level city, under the jurisdiction of Qujing, in Yunnan Province, China.
Document 12: Xuanhua District: Xuanhua () is a district in Zhangjiakou prefecture-level city in Hebei Province, China.
Document 13: Xinji: Xinji(辛集，Xīnjí) is a county-level city with sub-prefecture-level city status, located under the administration of the prefecture-level city of Shijiazhuang of Hebei Province in northern China. There are 8 towns (镇，zhèn) and 7 townships (乡，xiāng) under the administration of Xinji.
Document 14: Yangchun: Yangchun, formerly romanized as Yeungchun, is a county-level city in southwestern Guangdong, China, administered as a part of the prefecture-level city of Yangjiang. Yangchun has an area of 4,055 sqkm and had approximately 1.05 million inhabitants in 2003.
Document 15: Xiangfang District: Xiangfang District () is one of nine districts of Harbin, the capital of Heilongjiang province, China. It is an urban district in the pre-1940 part of Harbin, bordering the districts of Daowai to the north, Acheng to the southeast, Pingfang to the southwest, and Nangang to the west. It is an industrialized area, and contains the main scientific, technological and industrial zones of the city. The Harbin Development Zone is in the district.
ground_truth: China