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Sets ', showing uneven regional development trend, the prevalence of financing difficulties, the transformation of the body is not clear, the transformation is not the way the system and other issues before loading the line: both focus is difficult Prospect Industrial Research Institute released.' 2013--2017, China data intelligent building industry market prospects and investment strategic planning analysis report 'shows that China's current existing building area of ​​more than 50 billion square meters, more than 90% of high energy consumers, energy-saving building urban proportion of the existing building area only 23.1%. Guizhou Provincial Academy of building Research, said chief engineer Chen Zongjiang, if it reaches the same indoor comfort, Chinese energy consumption of unit building area is 2-3 times the same climatic conditions in developed countries, whether it is real pressure on resources, the environment, or urgent requirement for the masses living environment of comfort, energy-saving renovation of existing buildings is imperative. existing building Energy saving for building envelope, air conditioning, heating, ventilation, lighting, power distribution and hot water supply energy systems and other energy-saving comprehensive reform. North and South for the different climate and energy in the form of, respectively, the State introduced a northern heating areas and hot in summer and cold in winter, hot summer and warm winter zone residential energy-saving implementation of the views of existing buildings, technical guidance and financial awards complement the way. according to the plan, 'five-second' period, the completion of existing residential buildings in northern heating area heating measurement and energy-saving more than 400 million square meters, hot summer and cold in winter and hot summer and winter area both there residential building energy-saving 50 million square meters of public buildings energy-saving 60 million square meters. provinces and cities have also developed a task of transformation of existing building energy Conservation action Programme and the 'five-second' period. Guizhou clear 'Twelfth five-Year 'period, the state organ office buildings and large public buildings energy-saving operation and management focus. Anhui Province will also transform the doors and windows as' existing building Energy saving focused twelve five 'period. reporter in Guizhou, Anhui, Hebei, Jilin and other places learned that, due to the presence of existing buildings property forms, complex structure, the transformation of different standards, many factors raise the cost of reconstruction difficulties, existing buildings energy-saving energy conservation become unbalanced difficulty area: North on a large scale