09.
Unfold two valley-folds made from the step #6.
We are in the same state as the step #5 except there are four crease lines.
These crease lines are all valley-folded creases.
Prepare to convert the top two crease lines into mountain-folded ones.
10.
Prepare to apply the crease pattern (CP) shown on the left.
Be sure to convert the top two creases into mountain-folded ones.