Question: Which region in China is larger, Jiutai District or Nanchang?

Context paragraphs:
Qingyunpu Railway Station: Qingyunpu Railway Station, located in the Qingyunpu District, Nanchang, Jiangxi, China, is a station of Jingjiu Railway and terminus station of Nanchang Steel Plant Branch Line.

Jiutai District: Jiutai () is a district under the jurisdiction of Changchun, the capital of Jilin province, People's Republic of China.  The district is surrounded by agricultural areas and is located around 50 km northeast of downtown Changchun.  Coal mining also is present in Jiutai.  It borders Dehui to the north, Erdao District to the southwest, Kuancheng District to the west, as well as the prefecture-level city of Jilin to the south and east.

Nanchang–Ganzhou High-Speed Railway: The Nanchang–Ganzhou High-Speed Railway is a high-speed railway currently under construction between Nanchang and Ganzhou in Jiangxi province in China.  This forms the northern section of the larger Nanchang-Shenzhen High-Speed Railway.  The southern section of that railway, the Ganzhou–Shenzhen High-Speed Railway, commenced construction in January 2015.  This will eventually allow for fast connections from Jiangxi to several coastal cities in Guangdong and Fujian.

Kuancheng District: Kuancheng District () is one of six districts of Changchun, the capital of Jilin province, People's Republic of China.  It is part of Changchun's main urban area, located north of downtown.  It borders Dehui to the northeast, Jiutai to the east, Erdao District to the southeast, Nanguan and Chaoyang Districts to the south, Luyuan District to the southwest, and Nong'an County to the northwest.

Donghu District: Donghu District () is a district of Nanchang, the capital of Jiangxi Province, China.  The district was created in the Tang dynasty when a bridge was built across Nanchang's Taihu lake, dividing the area into the East and West Lake districts.  It covers over 22 km2 and as of 2003 had a population of 440,000.  People's Park, the largest public park in downtown Nanchang, is located in Donghu.

Erdao District: Erdao District () is one of six districts of Changchun, the capital of Jilin province, People's Republic of China.  It borders Jiutai to the north and east, Shuangyang District to the south, Nanguan District to the southwest, Kuancheng District to the northwest, as well as the prefecture-level city of Jilin to the southeast.

Xihu District, Nanchang: Xihu District (Chinese: 西湖区; Pinyin: Xīhú Qū), literally meaning "west lake district", is a district of Nanchang, the capital of Jiangxi Province, China.  The district was created in the Tang Dynasty when a bridge was built across Nanchang's Taihu lake, dividing the area into the East and West Lake districts.  It covers over 39 square kilometers and as of 2004 had a population of 460,000.

People's Park (Nanchang): People's Park () is an urban public park in Donghu District of central Nanchang, capital of Jiangxi province, China.  Covering an area of 32.6 hectare , it is the largest park in downtown Nanchang.  It has more than 14,000 trees of 175 different species.  Its layout is in the style of typical Chinese gardens of the Jiangnan region.  It is popular with local residents and tourists alike.

Wanli District, Nanchang: Wanli District (Chinese: 湾里区; Pinyin: Wanli Qū), is a district of Nanchang, the capital of Jiangxi Province, China.  It covers over 254 square kilometers in the northwestern part of Nanchang, within the West Mountains.  More than 70% is forest-covered and the majority of the economy is natural resource based, with forestry and Chinese medicinal herbs being the focus.  As of 2004, it had a population of 80,000.  It is 18 kilometers to the city center.

Nanchang: Nanchang () is the capital of Jiangxi Province in southeastern China.  s of 2010 , a population of 5,042,565 live in the prefecture, in which 2,357,838 live in the area made up of all five urban districts.  Located in the north-central part of the province, it is bounded on the west by the Jiuling Mountains, and on the east by Poyang Lake.  Because of its strategic location connecting the prosperous East and South China, it has become a major railway hub in Southern China in recent decades.

Supporting paragraphs: Nanchang Jiutai District
Answer: Nanchang