The Guangdong provincial government issued the energy conservation and emission reduction implementation plan of Guangdong Province during the 14th five-year Plan. Among them, it is proposed to promote the integrated construction of photovoltaic buildings and promote the application of solar photothermal systems in low-and middle-rise residential buildings, hotels, dormitories and apartment buildings. Improve the facilities of public water supply network and improve the level of leakage control of water supply network. By 2025, new urban buildings will fully implement green building standards, add 2 million square meters of ultra-low and near zero energy consumption buildings with Lingnan characteristics, and complete energy-saving green renovation area of more than 26 million square meters of existing buildings. the installed capacity of solar photovoltaic building applications will be increased by 1000 megawatts.