02 The diagonal line is folded as shown in Figure 1, and then the right-angle edge coincides with the diagonal line, as shown in Figure 2 below.
Then we expand it into an isosceles triangle, as shown in the following figure 1, and then overlap the corners with the creases formed in the figure 1 at the vertices of the right-angled edges, as shown in the following figure 2.
Fold the triangle in the lower right corner upward again, as shown in figure 1, and then we hide it in the gap of the triangle formed in figure 2 in step 3, as shown in figure 2 below, and after folding, as shown in figure 3.
Repeat this operation for the other six sheets of paper.
Then we choose two folded umbrella corners and insert them as shown in the figure below.
Then hide the redundant pink part in the lower right corner between two layers of red paper, and then hide the redundant red paper triangle between two layers of pink paper, as shown in Figure 2 after folding.
Then repeat the above operation, fold all the umbrella corners into a circle,
09, as shown below, while the back and cover of the umbrella are shown in Figure 2, Figure 1 respectively.
10 Then we choose a toothpick, apply glue on the top of the toothpick and stick it on the umbrella surface, as shown in the figure below.