What do the abscissa and ordinate in the risk matrix recommended in the China Civil Aviation Advisory Notice indicate respectively?

The abscissa and ordinate in the risk matrix recommended in China Civil Aviation Notice respectively represent the first quadrant of the plane rectangular coordinate system. The risk matrix is an MxN table, represented by rows and columns. The risk coordinate diagram generally represents the first quadrant of the plane rectangular coordinate system, which is represented by abscissa and ordinate. Note that the coordinates are calibrated, and the maximum value of possible coordinates is 1 (i.e. 100%), so the risk coordinate chart cannot be used for qualitative description. The risk coordinate diagram is the advanced stage of the risk matrix.