In a recent case of a hand-held vacuum cleaner, the first two paragraphs passed the second paragraph of the first draft, with several more color matching. During this period, there was a small turning point and a new plan was given. Finally, a new plan was selected (the new plan was also a draft). Well, on the whole, it was a relatively pleasant design cooperation (early communication, first proposal communication, revised draft communication, and subsequent payment was very smooth). The third one is for fun.