How to make a closed tall origami box

(page 16)

29th picture of closed tall origami paper box

29.

Start applying the valley-fold of the step #28.

Make sure that the layer #1 should be just below the layer #2 after applying the valley-fold.

30th picture of closed tall origami paper box

30.

Complete applying the valley-fold of the step #28.

Prepare to grab the last flap.