Yongkang, Zhejiang is 20 times larger than Caloocan.
Area: 53 km2 calculated
Caloocan is one of the cities that comprise Metro Manila, the National Capital Region of the Philippines. Located north to northeast of Manila, Caloocan is the country's third most populous city with a population of 1,489,040 as of the 2010 census. Wikipedia
Area: 1,065 km2 calculated
Yongkang is a county-level city located in the central part of Zhejiang province, People's Republic of China. It has an area of 1,049 km² and a population of 536,000 with more than 100,000 non-resident workers. Wikipedia