A decorative wall system comprises a supporting wall, a thin brick element with a mortise formed therein and a dovetail tenon clip with fastening means for insertion and retention in the mortise whereby the brick element is attached to the supporting wall. The apparatus includes a base having a planar surface allowing a tensile test sample bar to rest thereupon. The adhesive connecting member has a strongly adhesive layer and non-adhesive layer, and the adhesive connecting member was arranged at a bottom of the insertion hole via the weakly adhesive layer, so that the non-adhesive layer is lower. The processing device provides a graphical display of the configuration.