What's the difference between pastoral poetry and frontier poetry?

Obviously, the description is different. Landscape pastoral poems mostly describe gentle and beautiful mountains and rivers, while frontier poems mostly describe troops, expeditions, homesickness or desert grassland scenery outside the Great Wall and frontier fortress. The style is different. Landscape poems are more clear, delicate and carefree, while frontier poems are more heroic, vigorous and magnificent. I suggest you look at the pastoral poems and frontier poems in the prosperous Tang Dynasty and make a difference after reading them.