Topic summary
Largest city

Extracted from the Wikipedia article List of largest cities.
City proper (administrative unit)
The use of city proper as defined by administrative boundaries may not include suburban areas where an important proportion of the population working or studying in the city lives. Because of this definition, the city proper population figure may differ greatly from the urban area population figure, as many cities are amalgamations of smaller municipalities, and conversely, many Chinese cities govern territories that extend well beyond the core urban area into suburban and rural areas. The Chinese municipality of Chongqing, which is the largest city proper in the world by population, comprises a huge administrative area of 82,403 km, around the size of Austria. However, around 30% of its 30-million population are agricultural workers living in a rural setting.