'Photovoltaic (pv) of the world' this is a comprehensive system to introduce the development of photovoltaic (pv) in the past, present and future the sum of the corpus, wide-ranging, can meet the needs of different readers. The article content is for reference only. Fluid heat transfer formula has been made to sell electricity qualification of the collective enterprise, complete cancellation of qualification at the end of 2019, has been carried out to sell the business of collective enterprises, in 2019 by the end of the termination of the relevant business. Solar photovoltaic (pv) net news: recently, there's a circle of friends files the its industry about the notice of the company's business system collective enterprise to sell electricity back '( Industrial goods' 2019 】 No. 24) , shown in the notice, combined with the company collective slimming health work plan of the enterprise, the company system of collectively owned enterprises should focus on four types of core business, resolutely back to sell electricity business. The file according to requirements for: starting from the date of the notice issued, the system of collectively owned enterprises, the company may not have to sell, sell electricity business, involved in the sale of qualification of electric business investment. It is understood that the file receiving unit are respectively: its east China, northeast China division, its Beijing, tianjin, hebei, hebei north, photovoltaic sun room to install video in cup contest's shanxi, shandong, Shanghai, jiangsu, zhejiang, anhui, fujian, hubei, hunan, henan, jiangxi, sichuan, in cup competitions, liaoning, jilin, heilongjiang, MengDong website chongqing, shaanxi, gansu, qinghai, ningxia, xinjiang power, its new source company, its material company as well as its technical college. 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, also include the global photovoltaic industry professionals engaged in new energy or a review of the photovoltaic difficult development, solar photovoltaic (pv) network statement: this information is reproduced from the power grid cooperation media or other Internet website, solar photovoltaic network published the article for the purpose of the information, does not mean that agree with his point of view or confirm its description. That has been involved in the sale of electricity, business investment projects and partners do consultation, construction case analysis PPT closed by a liquidation, foreign transfer, the action of exit way! Fluid heat transfer formula