Luban Software, founded in 2001, has always been committed to the research and development and promotion of BIM technology, providing digital solutions based on BIM technology for construction industry related enterprises, contributing to the promotion of the construction industry to enter the era of intelligent construction, and advancing the construction of a 1:1 digital China. With the launch of the national strategy for the construction of Digital China, Luban Software Group has released the strategic positioning of the group in the new phase: digital city builder. Luban Software has laid out in advance and constructed a strategic layout of Digital China with BIM technology as the core foundation, running through the three major levels of household level, engineering level and city level. Lupin Software gives full play to the core ability of BIM technology leader and builds CityEye, an urban digital substrate with BIM big data as the core, combining advanced digital technologies such as geospatial data (GSD), Internet of Things (IoT), artificial intelligence (AI), virtual reality, big data, and so on, and constructs a digital city from the tenant level (Decoration Information Modeling), engineering level (Engineering Level), to the city level (Decoration Information Modeling). Decoration Information Modeling), engineering level (Building Information Modeling) to the city level (City Information Modeling) of the unified digital world, to realize the integration and fusion of three levels, multi-disciplinary, diversified BIM data, so that BIM data can be used in the whole life cycle of urban construction and operation. The BIM data will play a great role in the whole life cycle of urban construction and operation.