## 4 The Development Prospect and Technological Breakthrough of DC  
### Problems and Countermeasures in the Construction of New SC  
In 2020, the COVID-19 pandemic ravaged the world, causing traditional methods of production and life to face challenges. The demand for informatization and digitalization is surging, making urban digitalization an inevitable trend. In 2021, to realize \"dual carbon\" and accelerate the pace of high-quality urban progression, digital transformation will become a national strategy and become an important starting point to improve the city's energy level and build core competitiveness. In terms of national strategy, several ministries and commissions have issued policy documents to speed up urban digitalization construction and progression. At present, the tentacles of urban digital transformation are constantly extending to various fields, playing a driving role in improving the level of urban governance, optimizing the quality and efficiency of government services, promoting the innovative development of industries, and facilitating people's living needs. [PERSON] and [PERSON] [98] revealed that it is worth noting that if the government and enterprises are the service providers in the process of urban digital construction, then ordinary people are the witnesses, participants, and beneficiaries of urban digital transformation. Whether people can enjoy the convenience and benefit brought by digitization to work and life is one of the important measurement criteria of digital progression. There are many issues in the construction of DTs-based SCs. First, there is insufficient ideological understanding. Different regions have different views on SC, and their technical ideas and models are underdeveloped. Second, there is a lack of scientific, reasonable, and systematic top-level design and planning, insufficient prior research and evaluation, emphasis on technical input and neglect of upper structure and mass emotion, and lack of operation modes for SC construction in different cities. Third, it is difficult to share information on many platforms. There are many independently developed systems by various government departments, and there are information barriers. Fourth, there are loopholes in information security, the government's insufficient emergency response capacity, and the general public's weak awareness of security protection and prevention ability [99,100]. Fifth, there is a shortage of technical innovation talent, senior professionals with professional knowledge, and compound talent who understand government and enterprise management. Sixth, there is a low participation of social forces, great financial pressure in SC construction, and a lack of appropriate mechanisms to attract enterprises and social participation. Seventh, under the influence of the traditional management system, the protection of small interests, the imbalance of progression, and the lag of top-level design, different industries and different fields are developing independently, and the fragmentation of the segmentation is quite prominent, creating many \"information islands\". This inevitably leads to repeated construction and waste of resources, which also brings great difficulties to the interconnection, integration, and sharing of SC data and information. To improve the level of SC construction, the following six aspects should be considered. First, it is necessary to strengthen top-level design, formulate scientific and rational plans, formulate medium- and long-term plans for urban progression, strengthen overall planning and guidance, and formulate agreed standards and development models. Second, it is necessary to strengthen scientific and technological innovation, strengthen technological support, strengthen information technology construction, explore the adoption of 5G, big data, and AI in the progression of SCs, make up for the shortcomings of hardware equipment, establish and improve the technical specification system, and strengthen public relations of core technologies.