How to display different pieces in pvtu file with different colors

How can I display different pieces in the file “new3_0.pvtu” (143.9 KB)
in Paraview?

There are two pieces in the file. I have been trying to use Paraview to visualize this dataset, but I am having difficulty coloring each piece of the dataset with a different color.

Could you please provide me with some guidance on how to color each piece of the “new3_0.pvtu” dataset with a different color in Paraview? Any information or assistance you can provide would be greatly appreciated.

By examining the connectivity of the nodes with the Connectivity filter, each piece can be colored by the RegionId variable.

Filters > Alphabetical > Connecitivity

@Kenichiro-Yoshimi Thank you for your quick reply. It works. Appreciate!

When the server is start with one process, everything is ok.

When I start the server by ./mpiexec -n 5 ./pvserver, the filter seems to not work.