Cape Verde is 4.3 times larger than Yanshi.
Area: 4,033 km2 World Factbook
Population: 538,535 (July 2014) World Factbook
Cape Verde or Cabo Verde, officially the Republic of Cabo Verde, is an island country spanning an archipelago of 10 volcanic islands in the central Atlantic Ocean. Located 570 kilometres off the coast of Western Africa, the islands cover a combined area of slightly over 4,000 square kilometres. Wikipedia
Area: 933 km2 calculated
Yanshi is a county-level city administered by the prefecture-level city of Luoyang in western Henan province in the People's Republic of China. Yanshi lies on the Luo River. Erlitou, the main site of the eponymous culture, was discovered here in 1959. Wikipedia