I am not a person good at expressing. I would like to share about the latest technologies. The most popular topic nowadays is the energy. Many people would like to say how to use clean energy more efficiently. I would like to about the renewable energy and teach people to spend less on these kinds of energy. It is hard to explain complicated technologies, but I will try to use a more comfortable word to tell you about them. The most useful word is money so that I will stand on the investment way to talk about the renewable energy.