The image shows a square divided into four sections by crossed black lines. The vertical line shows Chinese gains (at the top) and Chinese losses (at the bottom). The horizontal line shows US gains (on the right) and US losses (on the left). The top right-hand quadrant shows positive-sum interaction, where both China and the United States gain. The bottom left-hand quadrant shows negative-sum interaction, where both the United States and China lose. The top left-hand and bottom right-hand quadrants are bisected by a diagonal line showing zero-sum interaction, where the gains of one country match the losses of the other. In the top left hand quadrant, the upper section shows a positive-sum game where Chinese gains outweigh US losses. Below the diagonal line is a negative sum interaction, where Chinese gains are exceeded by US losses.