The image shows a square divided into four sections by crossed black lines. The vertical line shows Chinese gains (at the top) and losses (at the bottom) in millions of US dollars. The horizontal line shows US gains (on the right) and losses (on the left) in millions of US dollars. The lines are divided into increments of ten. At the intersection of the lines is zero. The increments on the top half of the vertical line and the right-hand side of the horizontal line are numbered from zero to one hundred. The bottom half of the vertical line and the left-hand side of the horizontal line are numbered from zero to minus one hundred (below the intersecting line). Numbers are present at alternating increments (i.e. at 20, 40, 60, 80 and 100). A diagonal line runs from the top left-hand section to the bottom right hand section and shows zero-sum interaction, where the gains of one country match the losses of the other. The bottom left-hand quadrant shows negative-sum interaction, where both countries lose, and the top right hand quadrant shows positive-sum interaction, where both gain.

5.3 Cooperation and bargaining