First, cut the colored yellow paper into a circle. And fold it into exactly half and mark dots in between and again fold according to dots.
Do likewise as many as needed for your umbrella.
Now attach all the folds to form a flower.
Here make one end of the thin metal rod into the hook shape. And make sure to pass the hook into flower and at the end of rod bend it into U shape and attach the plastic cover to it.
Finally hang it using thread.