Is object with particle data be append or link to a new file?

Hi all

I am a new member. I have some quarries related to Blender workflow.
(1) What is the best practice to import BG and Characters to the current Animation file? We have reference option in Maya.
(2) Is object with particle data be appended or Linked to the new file? What I know without converting the particle to Mesh, we can’t group it or treat it as object.

Your valuable information is required. Thanks & regards.

Found out the soultion for the 2nd question by doing hit and trial.