Zhuozhou (China) is 8.4 times larger than Richmond, California.
Area: 86 km2 calculated
Richmond is a city in western Contra Costa County, California, United States. The city was incorporated on August 7, 1905. 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