"Lord Gong Geun, have you not heard of the saying 'Southern boats, Northern horses'?" Southern boats, Northern horses (南船北馬). A phrase that succinctly describes the transportation system of ancient China, meaning that boats were the primary mode of transportation in the southern regions, while horses were representative in the north. "You're thinking of maritime trade?" Instead of answering, I descended from the pavilion and picked up a tree branch. Using the branch, I drew a map of Northeast Asia on the ground. Since I only drew the coastlines, the map was completed in an instant. Afterward, I used the branch to draw a line connecting the lower reaches of the Yangtze River to the southern part of the Korean Peninsula. "The Dongyi people." "That's not all." I drew another line from the southern Korean Peninsula to Liaodong. "Gongsun Do?" "That's right." After finishing the drawing, I returned the branch to its original place. "Trade along the lines I've drawn. You'll be able to obtain the supplies our forces need."