Who is the westerner in Zhuge Lingli's calculation?

Westerners in Zhuge Lingli's calculation usually refer to westerners such as Europe and America. In ancient China, people in these areas were mostly mysterious and unfamiliar due to the limitation of traffic and communication, so they were called "Westerners". In Zhuge's psychic books, it involves the prediction and analysis of westerners, mainly aiming at matters related to their business and political exchanges.