It was last verified for version 1.28. The capital area includes all provinces of a country which have a land connection only through the country's own provinces to the capital. Straits count as land connections. Despite the use of the word "area", it has nothing to do with areas.
版本1.28。按他这个定义是与大洲无关的，但我从亚洲迁都到欧洲，亚洲的省份为什么就不算我首都地区了。