Question: Out of Changchun and Chengde, site of the huge Qing emperors' palace, which Chinese city had the largest population in 2010?
Sentence (from "Changchun"): 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.
Relevant evidence: No