Core Insights - The article discusses the advancements in urban renewal and old housing renovation in China, highlighting the importance of modern technologies in improving design accuracy and efficiency [1][2][4]. Group 1: Urban Renewal and Housing Renovation - Since the implementation of urban renewal initiatives in 2019, nearly 280,000 old urban communities have been renovated, benefiting approximately 120 million residents [1]. - The integration of new technologies such as fusion modeling, 3D visualization WebGIS, and indoor pollutant simulation is transforming the design and renovation processes, making them more precise and efficient [1][2][7]. Group 2: Fusion Modeling Technology - Fusion modeling technology combines oblique photography and point cloud modeling to create high-precision 3D models, enhancing the detail and accuracy of building designs [2]. - This technology allows for better communication between designers and residents, enabling the exploration of multiple design options and early identification of potential issues [2][3]. Group 3: 3D Visualization WebGIS Platform - The 3D visualization WebGIS platform aids in urban renewal projects by allowing designers to visualize and analyze spatial data in a more interactive manner compared to traditional 2D software [4][5]. - Residents can engage in the renovation discussions by visualizing the outcomes of proposed changes, ensuring that the final designs meet their needs [4][5]. Group 4: Indoor Pollutant Simulation Technology - Indoor pollutant simulation technology helps identify and mitigate air quality issues during the renovation process, ensuring healthier living environments [7]. - This technology can predict air quality post-renovation by analyzing common pollutants and optimizing design elements accordingly [7]. Group 5: Virtual Reality Technology - Virtual reality technology provides immersive experiences for residents, allowing them to visualize and interact with future designs, thus enhancing public participation in the renovation process [8][9]. - As costs decrease and technology improves, virtual reality is expected to play a crucial role in urban renewal, facilitating faster and more cost-effective transformations of old buildings [9].