Question: Which city, Nanjing or Ningbo, is the capital city of Jiangsu province of People's Republic of China?

Context paragraphs:
Wuxi No.1 High School: Wuxi No.1 High School () is located in Wuxi, Jiangsu Province, People's Republic of China (PRC).  The school was built up in 1911 and famous for the high-quality education.It was called'Five Charming Roses among the High Schools in Jiangsu' with other four school which was High School Affiliated to Nanjing Normal University，Suzhou High School, Nantong Middle School of Jiangsu Province and Changzhou High School. Wuxi No.1 High School is the seventh best school in Jiangsu Province(The data from Chinese National Higher Education Entrance Examination).  The gist of Wuxi No.1 High School is to let students enjoy the school, encourage students to create new things and learn from playing.The principal of Wuxi No.1 High School now is Zhou Jingzhong.

Nanjing Iron and Steel Group: Nanjing Iron and Steel Group Corp., Ltd. is a Chinese conglomerate company based in Nanjing, Jiangsu Province, China.  It was a state-owned enterprise, but now it is a joint venture of Nanjing Iron and Steel Venture Investment (, about 36.07% owned by the worker union of Nanjing Iron and Steel Group) and state-owned enterprise Nanjing New Industrialization Investment Group in a 51–49 ratio.  Nanjing Iron and Steel Group formed another joint venture with Fosun International as an intermediate holding company of Nanjing Iron and Steel Company, in a 60–40 ratio.  On 31 December 2015 Fosun International appointed Nanjing Iron and Steel Group as a proxy for 1/6 of their voting rights, making the voting rights were equally shared between Nanjing Iron and Steel Group and Fosun International after 31 December 2015.

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.

Nanjing–Xi'an Railway: The Nanjing–Xian Railway or Ningxi Railway (), is a major trunkline railroad in China between Nanjing, the capital of Jiangsu Province and Xi'an, the capital of Shaanxi Province.  The Chinese name for the line, Ningxi, is named after the two terminal cities, "Ning", the Chinese character shorthand for the city of Nanjing, and "Xi" for Xian.  The line is 1,196 km in length and comprises the Xi’an-Hefei section in the west, 1,196 km in length, that opened on January 7, 2004, and the high-speed Hefei-Nanjing section in the east, better known as the Hefei–Nanjing Passenger Railway, 166 km in length, that opened on April 18, 2008.  In addition, a connection line 72 km in length was built in 2004 between the main line in Sui County and the Hankou–Danjiangkou Railway in northern Hubei.  The Ningxi Railway passes through five provinces in central and eastern China.  Major cities along route include Nanjing and Pukou in Jiangsu Province; Feidong, Hefei and Lu'an in Anhui Province; Huangchuan, Xinyang, Nanyang and Xixia County in Henan Province and Shangluo, Weinan and Xian in Shaanxi Province.  The main line skirts Hubei Province near Sui County.

Nanjing: Nanjing (  ), formerly romanized as Nanking and Nankin, is a city situated in the heartland of the lower Yangtze River region in China, which has long been a major centre of culture, education, research, politics, economy, transport networks and tourism.  It is the capital city of Jiangsu province of People's Republic of China and the second largest city in the east China region, with an area of 6600 km2 and a total population of 10,230,000.  The inner area of Nanjing enclosed by the city wall is Nanjing City (南京城), with an area of 55 km, while the Nanjing Metropolitan Region includes surrounding cities and areas, covering over 60 thousand square kilometres, with a population of over 30 million.

Zifeng Tower: Zifeng Tower (Greenland Center-Zifeng Tower or Greenland Square Zifeng Tower, formerly Nanjing Greenland Financial Center) is a 450 m supertall skyscraper in Nanjing, Jiangsu province, China.  The 89-story building completed in 2010 comprises retail and office space in the lower section.  The floors near the top feature a hotel, numerous restaurants, and a public observatory.  The tower’s stepping is functional, helping separate these sections.  The building is currently the tallest in Nanjing and Jiangsu province, the sixth tallest in China and the fourteenth tallest in the world.

Nanjing Road: Nanjing Road (; Shanghainese: "Nuecin Lu") is the main shopping street of Shanghai, China, and is one of the world's busiest shopping streets.  The street is named after the city of Nanjing, capital of Jiangsu province neighbouring Shanghai.  Today's Nanjing Road comprises two sections, Nanjing Road East and Nanjing Road West.  In some contexts, "Nanjing Road" refers only to what was pre-1945 Nanjing Road, today's Nanjing Road East, which is largely pedestrianised.  Before the adoption of the pinyin romanisation in the 1950s, its name was rendered as Nanking Road in English.

Nanjing Metro: The Nanjing Metro is the metro system serving the urban and suburban districts of Nanjing, the capital city of Jiangsu Province in the People's Republic of China.  The system has seven lines and 128 stations running on 257 km of track.  It is operated and maintained by the Nanjing Metro Group Company.  The total length of the system ranks fifth in China, after Shanghai, Beijing, Guangzhou and Shenzhen.  In 2015, the metro system carried a total of 720 million annual riders.

Nanjing (Liao dynasty): Nanjing was the name for Beijing during the Liao dynasty, when Khitan rulers made the city the southern capital.  To distinguish "Nanjing", which literally means "South Capital" in Chinese, from modern Nanjing in Jiangsu Province, Chinese historians sometimes refer to Beijing during the Liao dynasty as Liao Nanjing ().  The Khitan rulers of the Liao acquired the city, then known as Youzhou, in the cession of the Sixteen Prefectures in 938 from the Later Jin, and the city was officially renamed Nanjing, Youdu Fu (南京幽都府).  In 1012, the city was renamed Nanjing, Xijin Fu (南京析津府).  The city was also colloquially referred to at the time as Yanjing.  In 1122, the city was captured by the Jurchen Jin dynasty and was officially renamed Yanjing, ending the use of Nanjing for what is today modern Beijing.

Jiangsu Art Gallery: Jiangsu Art Gallery, usually known as Jiangsu Provincial Art Museum (), is a museum in Nanjing, in Jiangsu province in China.  It was founded in 1936, during the Nanjing decade, as China’s first state level museum.  In 1960, it was formally renamed as the Jiangsu Provincial Art Museum.  In 2010 it will re-open in a new building designed by the German architect studio KSP Jürgen Engel Architekten.  The museum hosts the Nanjing biennale.

Supporting paragraphs: Nanjing Ningbo
Answer: Nanjing