Mounting filesystem

Could anyone help me please as I am stuck up.

I want to mount /home/dun/maitree location of server A in server B to location /home/dun/tibco .Both server A and server B are Linux machine .The problem is that /home/dun/tibco of server B has some files and directory in it so after doing this mounting , the files and directories will be certainly be removed .Those files and directories are useful .Could anybody suggest some solution for this.:wall:

Create a directory in serverB:/home/dun/tibco and mount it there?