Tools/raw materials: a rectangular hard card, a ruler, scissors and pencils. 1. First measure the required width and length. The only thing to note is that the length must be reserved for sex: half the length of love+half the length of card+half the actual length of card+half the length of love. 2. Fold the card into two lines. Note: the love part does not need to draw a broken line. The figure below shows that it may be clear that the dotted line is just half of the card. 3. Fold it and unfold it. Next, start painting love. Draw half love on each side and a beautiful love, as shown below. 4. cut the outline of love and cut the opening of love on the left and right sides. 5. Next, you are done. Gently "buckle" the top of love in the bottom, and the simple love card passbook will be completed.