Some concept ideas of mine.
Clockwise from top-left:
南足 (Nan-zu): A Feng officer and confers with some scouts in a forest in the Nan'zu region. Nan'zu is the lowest region in the Feng Empire, and so is the warmest, wettest and most heavily forested region in the Empire. Unfortunately, the potential of this region has attracted the attention of other kingdoms.
山下村 (Shan'xia village): Shan'xia is one of the southernmost settlements in the Empire. This makes it a frequent target for border raids. In order to protect themselves, the village has been constructed like a Tulou. en.wikipedia.org/wiki/Tulou
大段州 (Da'duan): Da'duan is a large landing on the northern slopes of the Zhuque Mountain. The low elevation and intersecting river systems make excellent conditions for growing crops. As such, Da'duan is a major food producer in the Feng Empire. In the back of the landing, Bei'men city, the largest city in Feng's North can be seen.
南口市 (Nan'kou City): Nan'kou city is the oldest settlement above-ground settlement in Feng. The Nan'kou gateway was discovered in a road between two major cities. This allowed large numbers of people to flow out onto the surface. Nan'kou's population first surged and then fell as people moved on to settle more favorable areas.
雪门村 (Xue'men village): The highest gate-settlement in the Empire. Xue'men lies well above the treeline, making farming all but impossible. Xue'men exists only as a site for research and to export ice and water to the Feng capital.