How to make a large flat rectangular origami box (page 5)

 

07. Apply two horizontal "mountain-folds" of the step #6 and then unfold.   Prepare to apply two vertical "mountain-folds" and then unfold.

08. Apply two vertical "mountain-folds" of the step #7 and then unfold.   Currently there are 10 crease lines.

 

 

 

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