Heshan, Guangdong is 25 times larger than Manila.
Area: 1,072 km2 calculated
Heshan is a county-level city of Jiangmen City in the southern part of Guangdong Province, China with a total land area of 1,108.3 square kilometres and a population of 360,000. If migrants this figure rises to around 550,000 persons residing within the city's borders. Wikipedia
Area: 42 km2 calculated
Manila is the capital and second largest city of the Philippines. It is one of the sixteen cities which, along with the municipality of Pateros, make up Metro Manila, the National Capital Region, whose overall population is around 12 million. Wikipedia