I believe a lot of people have played the following game in childhood: igniting matches by focusing sunlight with a magnifier. So when we lament about the low efficiency of solar energy, can we learn from this method? IBM has made such an attempt. IBM used convex lens to focus light and project it onto the solar panel to increase the intensity of sunlight, thus increasing the power generation of solar cells. Through this method, 230 watts of solar energy was successfully converted into 70 watts of electricity, and the conversion efficiency is about 5 times that of traditional solar systems.