Dongguan (China) is 13 times larger than Cedar Rapids, Iowa.
Area: 187 km2 calculated
Population: 128,119 (2012)
Cedar Rapids is the second largest city in Iowa and is the county seat of Linn County. The city lies on both banks of the Cedar River, 20 miles north of Iowa City and 100 miles east of Des Moines, the state's capital and largest city. Wikipedia
Area: 2,456 km2 calculated
Population: 6,445,777 (2000)
Dongguan is a prefecture-level city in central Guangdong province, People's Republic of China. Wikipedia