Cheng spent a year and a half learning more about solar cells, traveling to Europe, the US and Japan to hear the perspectives of more than 50 experts. He was surprised to learn that over the previous decade, aided by the support of the German and Japanese governments, the global solar cell industry had grown by more than 30 % annually.
為了一片不到一公分厚的太陽能板，鄭福田花了一年半時間到歐洲、美國、日本等地區，聽取超過 50 位學者專家的意見，他赫然發現：過去 10 年在德國與日本政府的獎勵帶動下，全球太陽能電池產業每年成長率高達三成多。