[solved]Question on animating particle in Paraview

Hi everybody,

I met some problems on displaying particle in paraview. In my modeling, I have two types of particles. When I postprocess the vtk data in paraview. In 'Coloring' category, I choose 'type'. But the two type particles display the same color. I check the vtk file and there are two types there. Can anyone help to explain why? Besides, how can display particle in real size? Thanks.

See picture below.
The left port is fed with type 1 particle and the right port is fed with type 2 particle