Method 1: (1) First, choose a beautiful piece of Bao Shu paper (such as expired old calendar paper), the size of which is slightly larger than that of the book. (2) Fold inward along the dotted line as shown in figure 1 (the outline of the dotted line should be the size of a book after expansion); Cut the part of Bao Shu paper (figure 1 where scissors are drawn) with thin thread and fold it inward (the size of the cut part is slightly larger than the thickness of the spine 1 ~ 2mm). (3) Put the book into Bao Shu paper, and insert the front cover and back cover of the book into the folding seams on both sides of Bao Shu paper respectively. In this way, a book is packaged. If senior students are interested, they can also learn another more complicated corner pocket calligraphy. Method 2: (1) Select a piece of Bao Shu paper, as shown in Figure 2, fold it inward along the thin line, and cut out the shape as shown in Figure 3 along the dotted line (where scissors are drawn). (2) As shown in Figure 3, take the angle 1 as an example, and fold it up twice along the dotted line to form the shape shown in Figure 4. (3) As shown in Figure 4, fold the extra corners to the inside of Bao Shu paper along the dotted line. A corner of the book is finished. (4) Fold the other three corners in the same way.

Reference: sports.eastday/eastday/node2524/node3210/node17399/node117402/userobject18440.