Dengfeng (China) is 18 times larger than Arlington County, Virginia.
Area: 67 km2 calculated
Arlington County is a county in the Commonwealth of Virginia. It is coterminous with the U.S. Census Bureau-designated place of Arlington, which is the second-largest principal city of the Washington, D.C. metropolitan area. Wikipedia
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