How to make a long rectangular origami box

(page 5)

7th picture of long rectangular origami paper box

07.

Apply four vertical valley-folds of the step #6 and then unfold.

Now, you have completed making a "8x8 matrix base" .

Prepare to apply two vertical "valley-folds" .

8th picture of long rectangular origami paper box

08.

Apply two vertical "valley-folds" of the step #7.

Prepare to turn the paper over.

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