The complexity of digital city coexists with the diversity of subjects, which makes it difficult to coordinate the construction and operation. The city is a complex organic organism, and the construction of digital city is faced with a social complex that is constantly evolving according to the environment.
In this complex, diversified subjects form an intertwined and changeable urban supply and demand network due to different development needs and social division of labor. Digital city construction is a process from single reproduction to evolution and optimization of complex urban scenes. The precise digital reproduction of any scene will involve multiple nodes of the urban supply and demand network, and ultimately achieve the dynamic balance in the three-dimensional interaction of many subjects.
In this process, the perfect integration of sensing technology, transmission technology, platform technology and digital applications is needed to meet the multi-level needs of urban organic life. The differences in technological forms, the diversity and variability of demand subjects all bring challenges to the construction of digital cities.
The pace of digital city system construction and digital technology application is not coordinated, and the digital gap is difficult to bridge in the short term. At present, China's digital technology is developing rapidly, artificial intelligence and big data technology are gradually mature, and some technology levels are leading in the world, and are applied in some urban scenes. The effect of scene application is closely related to the operator's digital ideology, digital infrastructure level, digital system and mechanism construction, and digital literacy. However, due to the difference of urban economic foundation, especially the development foundation of digital economy, and the difference of urban population structure, the level of digital infrastructure construction and ideology among cities are different, and the construction of urban digital system and mechanism is still at the stage of crossing the river, which has affected the pace of digital cities to some extent.
The long-term sustainable investment and short-term value of digital city are not significantly contradictory, and the sense of gain of the masses is not strong. The construction of digital city is a system closely integrated with the development of physical city construction. Long term and continuous digital investment of cities is required. Especially in the early stage of digital city construction, the construction of information infrastructure and platform capacity requires a large amount of capital investment. Before the systematic and mature application, it is difficult for the masses to have a strong sense of gain. In addition, the source of funds is also one of the main factors affecting the construction of digital cities. Affected by the COVID-19, many local governments have taken measures such as reducing budget, reducing project amount, and lengthening project cycle to reduce financial pressure, which has brought greater pressure to the construction of digital city.