## 2 Literature Review
### Application of BIM and VR Integrated Technology in the Field of Construction  
Over the past twenty years, VR technology has gradually gained increasing attention in the AEC (Architecture, Engineering, and Construction) industry [28]. As an immersive digital technology, VR creates rich virtual environments that allow real-time interaction with digital objects. This technology has been used to solve a variety of design, construction, and operational problems, including design coordination and review, construction education, risk management, safety management, real estate sales [29; 30; 31], etc. Multiple studies have shown that VR technology can support design reviews and positively impact the quality of review results [32]. [PERSON] [33] conducted a quantitative analysis and found that more design errors could be detected in VR systems than traditional CAD model engineering design reviews. However, current practical limitations hinder the development of VR applications in the construction industry, such as the lack of rich building information and robust modeling capabilities of VR software.  
With the development of technology, traditional BIM-based game engines have expanded into VR systems. VR facilitates interaction with various components and offers participants an immersive experience [34]. Research shows that BIM, as a technology that generates, communicates, and analyzes building models, integrates substantial data, offering rich content resources for virtual simulation technologies [35; 36]. VR can create a strong sense of presence and trigger users to behave in real environments [10]. Integrating BIM and VR technologies and analyzing project data using BIM-based game engines can improve the entire construction industry's workflow, enhance communication, understanding, and consensus among project participants at different phases, including improving design processes, reducing misunderstandings, identifying construction hazards, and enhancing safety awareness [12; 37; 38].  
More and more researchers are devoted to exploring the BIM and VR-integrated technology applications in the construction industry. [PERSON] et al. [39] introduced a framework to integrate BIM and VR in construction and its application prospects, including building models, equipment simulation, character modeling, collision detection, path planning, material, and lighting. [PERSON] et al. [28] developed an innovative data transfer method, BVRS (BIM, VR Real-Time Synchronization), using a cross-platform cloud infrastructure to create a metadata communication interpretation system, synchronizing BIM data in VR devices in real time and enhancing collaborative work efficiency, thus promoting the applicability of VR technology in the decision making of a construction project. [PERSON]'s [40] research indicated that applying BIM and VR technology in prefabricated building constructions could further refine the entire construction process, improving the overall quality of the project.  
While many studies have proposed the application of BIM and VR technology in the construction industry, the overall development of BIM and VR is still very immature. It faces numerous challenges, such as data conversion from BIM to VR, insufficient verification, and limited dissemination of integrated technology. Meanwhile, its utilization is limited to safety management and educational training during construction. Therefore, there is significant scope for research in applying BIM and VR-integrated technology in the construction industry.