The digital twin smart city, as the advanced stage of the smart city, is driven by technological means such as 5G and AI to reshape the city, digitize, platform and label the city twin, and reshape urban planning from a new perspective of integration and management. The city's infrastructure, such as water, electricity, gas, transportation and its operation status; the city's resources, including medical care, fire protection, police, education, etc., will be collected into the digital twin through the Internet of Things technology. 2. Policy and standard dual drive Driven by policies, China's digital twin cities have ushered in an exploratory period of "integrated construction". In 2020, the National Development and Reform Commission and the Central Network Information Office pointed out for the first time that digital twin is one of the seven new-generation digital technologies, which means that digital twin technology has been incorporated into the national development strategy system.
In addition, the "14th Five-Year Outline" proposes to accelerate digital development and build a digital China, explore the construction of digital twin cities, and point out that digital twin cities are complex and comprehensive technical systems that support the construction of new smart cities. In order to comprehensively and systematically promote the construction of digital twin cities, the standard formulation work has also accelerated, and a number of key standard projects have also been officially launched both internationally and domestically. In China, the National Phone Number List Standardization Committee has also begun to establish industry standards such as the "Digital Twin City Unified Identification and Coding System". In 2021, my country will make initial progress in the formulation of ecological construction standards.
The Internet Society of China has established a digital twin technology application working committee, and the China Communications Standardization Committee has established a digital twin standard subgroup. 3. Technology development promotion As a technical framework for the comprehensive application of 5G, cloud computing, artificial intelligence, big data, edge computing and other technologies, digital twins have also moved from conceptual construction to application in recent years with the development of these underlying supporting technologies. Under the national strategy of new infrastructure, China has accelerated the construction of IPv6, NB-IoT, 5G and other networks. According to the introduction of the chief engineer of the Ministry of Industry and Information Technology of China, as of November 2021, my country has built and opened more than 5G base stations. 1.39 million, and the low latency of 5G enables smart terminals of the Internet of Things to communicate information in real time.