Question: Which city has a larger population, Ningbo or Huainan?

full_context: Document 1: Dongguan: Dongguan is a prefecture-level city in central Guangdong Province of South China. Often considered the cultural capital of the Pearl River Delta, Dongguan borders the provincial capital of Guangzhou to the north, Huizhou to the northeast, Shenzhen to the south, and the Pearl River to the west. It is part of the Pearl River Delta megacity with more than 44.78 million inhabitants at the 2010 census spread over nine municipalities (including Macao) across an area of 17,573 km2 . Dongguan's city administration is considered especially progressive in seeking foreign direct investment. Dongguan ranks behind only Shenzhen, Shanghai and Suzhou in exports among Chinese cities, with $65.54 billion in shipments. It is also home to one of the world's largest, though largely empty, shopping malls, the New South China Mall. The majority of the population speak Mandarin due to migrants from other parts of the country.
Document 2: Ningbo:    , formerly written Ningpo, is a sub-provincial city in northeast Zhejiang province in China. It comprises the urban districts of Ningbo proper, three satellite cities, and a number of rural counties including islands in Hangzhou Bay and the East China Sea. Its port, spread across several locations, is among the busiest in the world and the municipality possesses a separate state-planning status. As of the 2010 census, the entire administrated area had a population of 7.6 million, with 3.5 million in the six urban districts of Ningbo proper. To the north, Hangzhou Bay separates Ningbo from Shanghai; to the east lies Zhoushan in the East China Sea; on the west and south, Ningbo borders Shaoxing and Taizhou respectively.
Document 3: Fuyang:    () is a prefecture-level city in northwestern Anhui province, China. It borders Bozhou to the northeast, Huainan to the southeast, Lu'an to the south, and the province of Henan on all other sides.
Document 4: Ningbonese people: The Ningbonese or Ningbo people are the people of Ningbo, China, whether resident or abroad. The Ningbonese are a subgroup of the Wu Han ethnicity. Many famous Chinese people have come from Ningbo and many more have Ningbo as their ancestral home. A large percentage of Shanghainese people have ancestry in Ningbo.
Document 5: Bengbu: Bengbu () is a mid-sized city in northern Anhui Province, China. Its built-up ("or metro") area made of 4 urban districts has nearly one million residents, though the Prefecture-level city under its jurisdiction had 3,164,467 registered residents at the 2010 census. Its name means "Oyster Wharf" in Chinese, echoing its former reputation as a freshwater pearl fishery.
Document 6: Huainan: Huainan () is a prefecture-level city with 2,334,000 inhabitants in central Anhui Province, People’s Republic of China. It borders the provincial capital of Hefei to the south, Lu'an to the southwest, Fuyang to the west, Bozhou to the northwest, Bengbu to the northeast and Chuzhou to the east.
Document 7: Lu'an: Lu'an (), is a prefecture-level city in western Anhui province, People's Republic of China, bordering Henan to the northwest and Hubei to the southwest. At the 2010 census, it had a total population of 5,612,590, whom 1,644,344 resided in the built-up area made of 2 urban districts. Neighbouring prefecture-level cities are the provincial capital of Hefei to the east, Anqing to the south, Huanggang (Hubei) and Xinyang (Henan) to the west, and Huainan and Fuyang to the north. Although the character "六 " (literally: "six") is normally pronounced "Liù", in this case it changes to "Lù" on account of the historical literary reading.
Document 8: Jinshan District: Jinshan District, is a suburban district of southwestern Shanghai, neighboring Zhejiang province and Hangzhou Bay. It has a land area of 586.14 km2 and a population of 732,500 as of the 2010 Chinese census. Jinshan District, located in the southwest of Shanghai, is one of the biggest districts of the city. Local political administration is divided into nine towns and one subdistrict. About 6.2 km off the coast of Jinshan, there are three islands named Da Jinshan ("Big Gold Mountain"), Xiao Jinshan ("Little Gold Mountain"), and Fushan ("Floating Mountain"). At 103 m above sea level, the peak of Dajinshan Island is the highest point within the Shanghai municipality. There are several beaches along the 23.3 km shoreline, which are popular tourism destinations.
Document 9: Huai'an: Huai'an (), formerly called Huaiyin () until 2001, is a prefecture-level city in central Jiangsu province of Eastern China. It borders Lianyungang, Suqian to the north, Yancheng to the northeast, Yangzhou to the southeast, and Chuzhou (Anhui) to the southwest.
Document 10: Chuzhou: Chuzhou () is a prefecture-level city in eastern Anhui Province, China. It borders the provincial capital of Hefei to the southwest, Huainan to the west, Bengbu to the northwest, Chaohu to the south, and the province of Jiangsu to the east. According to the 2010 Census, the city of Chuzhou has a registered population of 3,937,868 inhabitants, whom 562,321 lived in the built-up ("or metro") area made of 2 urban districts. Nevertheless, 7,260,240 persons declared to be permanent residents.
Document 11: Xiaoshan–Ningbo Railway: The Xiaoshan–Ningbo Railway or Xiaoyong Railway (), is a double-track railroad in eastern China between Hangzhou and Ningbo in Zhejiang Province. Its name in Chinese, the Xiaoyong Line, is named after the railway's two terminal stations, Xiaoshan, a suburban district of Hangzhou on the southern bank of Qiantang River, and Ningbo, whose Chinese character abbreviation is "yong". The line is 147.3 km long and was originally built in three parts in 1912, 1914 and 1936 and then rebuilt in 1959 and electrified in 2009. Cities along route include Xiaoshan District of Hangzhou, Shaoxing, Shangyu, Yuyao and Ningbo, all in Zhejiang Province.
Document 12: Anhui: Anhui ( ; ) is a landlocked province of the People's Republic of China located in the eastern region of the country. Located across the basins of the Yangtze River and the Huai River, it borders Jiangsu to the east, Zhejiang to the southeast, Jiangxi to the south, Hubei to the southwest, Henan to the northwest, and Shandong for a short section in the north. The provincial capital is Hefei.
Document 13: Shou County: Shou County or Shouxian () is a county in Anhui Province, China, under the jurisdiction of Huainan City. Its population is 1,280,000 and its area is 2986 square kilometers. It is a National Cultural and Historical City. the jurisdiction of Shou County was transfer from Lu'an to Huainan.
Document 14: Quanzhou: Quanzhou, formerly known as Chinchew, is a prefecture-level city beside the Taiwan Strait in Fujian Province, China. Its is Fujian's largest metropolitan region, with an area of 11,245 km2 and, as of the 2010 census, a population of 8,128,530. Its built-up area is home to 6,107,475 inhabitants, encompassing the Licheng, Fengze, and Luojiang urban districts; Jinjiang, Nan'an, and Shishi cities; Hui'an County; and the Quanzhou District for Taiwanese Investment. Quanzhou was China's 12th-largest extended metropolitan area in 2010.
Document 15: List of administrative divisions of Shanghai: Shanghai is one of the four direct-controlled municipalities of People's Republic of China, and is further divided into 16 districts. There is no single downtown district in Shanghai as the urban core is scattered across several districts, although Huangpu is generally considered the center of Shanghai. Today's Huangpu is the result of the mergers of three old districts: the original Huangpu District merged with Nanshi District in 2000, and in 2011 Luwan District also merged into Huangpu. Huangpu is now the location of the city hall, The Bund, and shopping areas including the famous Nanjing Road, Huaihai Road, and Xintiandi. Across the Huangpu River, Pudong includes Lujiazui, the financial center of Shanghai as well as China, and has been undergoing rapid development since its formation in 1992. In April 2009 Nanhui District was merged into Pudong. Other prominent business and shopping areas include Xujiahui in Xuhui District, Jing'an Temple in Jing'an District, Hongqiao in Changning District, Wujiaochang in Yangpu District, and North Sichuan Road in Hongkou District. Many universities in Shanghai are located in Yangpu, Minhang, and Songjiang Districts.
ground_truth: Ningbo