The liner will protect your wallpaper from the texture of the concrete.
How to hang backdrops on concrete wall.
Hang a heavy duty wall liner directly over the concrete.
Cut the liner in strips according to the dimensions of your wall.
Hold for 30 seconds and release.
Remove the paper lining on the back of the hook line it up straight and press the hook firmly onto the wall.
Instead they have adhesive backings which can stick firmly to the wall.
Using a screwdriver or the screw bit on your drill screw the screw into place in the anchor leaving a bit coming out of the wall so you have a surface on which to hang your photo.
Press the adhesive side of the hook to the wall for 30 seconds.
If you are hanging a shelving bracket place the bracket between the anchor and the screw and then drill the screw into place.