How did kievan Russia and the Byzantine empire similarly increase their wealth?

Kievan Russia and the Byzantine Empire both increased their wealth through strategic trade routes and extensive commerce. Kievan Russia benefited from its position along the trade routes between Scandinavia and the Byzantine Empire, facilitating the exchange of goods such as furs, honey, and slaves for silver and luxury items. Similarly, the Byzantine Empire's control over key trade routes in the eastern Mediterranean allowed it to dominate trade in spices, silk, and other valuable commodities. Both civilizations also leveraged their political power to establish lucrative alliances and tribute systems, further enhancing their economic prosperity.