Qidong, Jiangsu (China) is 6.5 times larger than Fremont, California.
Area: 200 km2 calculated
Fremont is a city in Alameda County, California. It was incorporated on January 23, 1956, from the merger of five smaller communities: Centerville, Niles, Irvington, Mission San Jose, and Warm Springs. Wikipedia
Area: 1,311 km2 calculated
Qidong is a county-level city under the administration of Nantong, Jiangsu province, China. It is located on the north side of the Yangtze River opposite Shanghai and contains the province's easternmost point. It has a population of 1.12 million. The center of the city is named Huilong Township. Wikipedia