Dengfeng (China) is 29 times larger than West Covina, California.
Area: 1,225 km2 calculated
Dengfeng is a county-level city in Zhengzhou, Henan Province, China. In ancient times, it was known as Yangcheng. Dengfeng has an area of 1220 square kilometers and a population of 630,000. Dengfeng is located at the foot of the Mount Song, one of the most sacred mountains in China. Wikipedia
Area: 42 km2 calculated
West Covina is a city in Los Angeles County, California, located 19 miles east of Downtown Los Angeles in the eastern San Gabriel Valley and is part of Greater Los Angeles. The population for the city was 106,098 at the 2010 census. Wikipedia