firsly put a piece of playing cards in the box which covered by the pastic pice
2. secondly take another piece in the hand tearing it into shreds afterthe audience see the points clearly
3.thirdly put the broken paper into the base of the box keep in flat and smooth in order to let the plastic piece covered smoothly on it no scar
4.fourhly covered the small box grasp with the left hand the palm faces up pats with the right hand above the small box then the good playing card which has prepared in the box will drop along with the plastic piece cov-ering above the broken one after doing this when we open the box it appears a piece of complete playing card
5.fifthly except the above use the box also can use to change the color deterioration of the cards make one white paper change into a mane card appears and vanishes etc