With a wave of his hand, Yellow Dragon projected those regions once more and spoke to Duobao and Xuandu.
"The plains have level ground and ample water, making them suitable for large-scale farming. With spiritual energy so abundant there, these tribes produce far more grain than they need. It piles up like mountains, and what they cannot eat simply molds and rots. Yet meat, medicinal herbs, and other supplies are relatively scarce."
Yellow Dragon pointed to the green regions in the image.
"The mountain regions have plenty of wild animals, but little land suitable for growing crops. These tribes live mainly by hunting, yet they have few fields in which to grow the Five Grains."
He pointed to the brown regions.
"Deep in the mountains, there is neither enough game to hunt nor enough level ground to farm. But rare medicinal herbs grow there!"
Yellow Dragon laid out the strengths and weaknesses of each region.
Duobao studied the image in silence for a long while before speaking slowly. "Every tribe has its strengths and its shortages. The plains tribes have plenty of grain but lack meat and herbs; the mountain tribes have plenty of meat but lack grain and herbs; the deep-mountain tribes have plenty of herbs but lack grain and meat..."
He raised his head, a glimmer of understanding in his eyes. "You mean these tribes need to trade with one another?"
Yellow Dragon nodded. "Exactly. Every tribe has advantages and disadvantages. Unless they can make up for one another's shortages, they'll struggle to grow stronger."
He rose and walked across Green Jade Plaza. His gaze settled on the Human Ancestral Land at the foot of the mountain as he spoke.
"Across this land, countless Human Race tribes have surplus goods. If those goods circulate among the Human Race,