You can check Geographic Advantages from in the Settings menu in Main Screen, found at the top-right of the screen. Geographic Advantages are special effects that each of the 17 provinces of China hold. Each province has one Geographic Advantage, and it has a powerful effect on the force who owns it. In order to gain the Geographic Advantage of the province, each province has a certain number of cities that must first be suppressed. By gaining Geographic Advantage, you can improve foreign relations with outlander forces, as well as conduct trade with various foreign nations. There are also other beneficial effects in administration and battle.
The number of cities that must be suppressed to gain Geographic Advantage.
The number of cities your force has suppressed.
Suppression status of the province being focused on.