This paper not only includes editor Wolfgang & middot; Dr Parr, herself, in its new energy career of more than 50 years, the deep understanding of the development of photovoltaic (pv) and system summary, silicon wafer manufacturing process also includes the global photovoltaic industry professionals engaged in new energy or a review of the photovoltaic difficult development, so the heat exchange station drawing diagram 'photovoltaic (pv) of the world' this is a comprehensive system to introduce photovoltaic development solar vacuum tube, and now the past and the future the sum of the corpus, heat exchanger station drawings graphic photovoltaic useful undergraduates pay wide-ranging huaneng power plant, can meet the needs of different readers. Cemetery investment industry prospects