Question: Which has a greater population, Changchun or Huainan?
Context: 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. Victoria is the capital city of the Canadian province of British Columbia, and is located on the southern tip of Vancouver Island off Canada's Pacific coast.  The city has a population of 85,792, while the metropolitan area of Greater Victoria has a population of 383,360, making it the 15th most populous Canadian metropolitan area.  The city of Victoria is the 7th most densely populated city in Canada with 4,405.8 people per square kilometre, which is a greater population density than Toronto. 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. Cradock is a settlement 320 kilometres north of Adelaide on the Hawker to Orroroo Road in South Australia.  The nearest town with a greater population is Hawker which is approximately 20 km away with a population of around 360.  Cradock is in the Flinders Ranges Council area, the state Electoral district of Stuart and the federal Division of Grey.  The southern part of the locality is in the electoral district of Stuart and District Council of Orroroo Carrieton. Liaoyuan () is a prefecture-level city in Jilin province, People's Republic of China.  It is bounded on the west and south by Tieling of Liaoning province, west and north by Siping, and east by Tonghua and Jilin City.  Liaoyuan lies some 100 km south of Changchun, the provincial capital.  Covering an area of 5,125 km2 , Liaoyuan is the smallest among the prefecture-level divisions of Jilin.  Liaoyuan has a total population of 1,176,645 in the prefecture, while the urban area has a population of 462,233. 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. 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. Dehui () is a county-level city under the jurisdiction of Changchun, the capital of Jilin province, People's Republic of China, located in the middle of the Songliao Plain.  It has a total population of 906,000 and a rural population of 753,000.  Composed of 10 towns, 4 townships and 4 subdistricts, under which there are 308 villages, it is around 80 km north-northeast of central Changchun.  It borders Yushu to the northeast, Jiutai to the south, Kuancheng District to the southwest, Nong'an County to the west, as well as the prefecture-level cities of Jilin to the southeast and Songyuan to the northwest. 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. A multiple baseline design is a style of research involving the careful measurement of multiple persons, traits or settings both before and after a treatment.  This design is used in medical, psychological and biological research to name a few areas.  It has several advantages over AB designs which only measure a single case.  It is important to note that the start of treatment conditions is staggered (started at different times) across individuals.  Because treatment is started at different times we can conclude that changes are due to the treatment rather than to a chance factor.  By gathering data from many subjects (instances), inferences can be made about the likeliness that the measured trait generalizes to a greater population.
Answer: Changchun