how to change the kde4 plasma desktop to folder view for all users

I see there is one solution for individual user, https://centosfaq.org/centos/how-do-i-default-to-folder-view-in-my-custom-kde-user-profile/ , and my question is, how to change that for all users? is there any setting system level configure file? Thanks! ps. i run the "kde4-config --path config", and it shows below paths, [root@New122 kde]# kde4-config --path config /root/.kde/share/config/:/etc/kde/:/usr/share/kde-settings/kde-profile/default/share/config/:/usr/share/config/ I searched aboved paths, but no clue is found.