This is a Pie of Pie plot, which has two pie charts connected by two straight lines:
*One of the pie chart is the main pie chart, locates at the left of layer, shows whole component distribution in percentages including the wedge "Other" which is the sum of combined wedges.
*Another pie chart is the child pie chart, locates at the right of layer, shows the detailed information of the combined wedges of the wedge "Other".
To know how to plot this graph, please download the above project file (in the Zip file). There is a Note window to show the detail steps for plotting this graph.