Group 1 - The article discusses new regulations regarding building area calculations and volume ratios in Hefei, aimed at optimizing residential and non-residential building designs [31][32][20] - The new rules prohibit unreasonable balcony designs from being counted towards usable area, which may reduce the area developers can offer as "gifted" space [31][32] - The regulations also introduce specific height and area requirements for various building types, including residential and non-residential structures, to ensure compliance with urban planning standards [4][5][18] Group 2 - The article highlights the impact of these regulations on future real estate projects, indicating that developers may face challenges in marketing new properties due to stricter area calculations [31][32] - It mentions that the new rules will apply to all construction projects in Hefei, with a transition period for those who have already acquired land use rights [20][32] - The regulations are expected to influence the pricing and design strategies of new residential projects, as developers adapt to the changes in volume ratio calculations [31][32]