Zhuozhou (China) is 6.9 times larger than Rancho Cucamonga, California.
Area: 104 km2 calculated
Rancho Cucamonga is a suburban city in San Bernardino County, California. As of 2014, Rancho Cucamonga's population was 165,775 people.Since 2000, it has had a population growth of 29.53 percent. L. Dennis Michael was elected as the city's mayor on November 2, 2010. Wikipedia
Area: 717 km2 calculated
Zhuozhou is a county-level city with 628,000 inhabitants in Hebei province, bordering Beijing to the north. It is administered by Baoding prefecture-level city. Zhuozhou has 3 subdistricts, 6 towns, 5 townships, and 1 development zone. Wikipedia