Experts explained that digital twinning is to create a digital "clone" for a physical device or system by using data such as physical model, sensor update and running history. For example, in the digital world parallel to reality, you have an identical "twin brother", who is completely synchronized with you and even takes a quick look at the future world than you, telling you in advance what will happen in the future and how to deal with it. At present, this technology has been applied to complex engineering construction fields such as bridges, tunnels and subways, and gradually extended to industrial production fields.

In the view of Academician Li Peigen, a professor at China University of Science and Technology, digital twinning is the soul of intelligent equipment, and the application of digital twinning is gradually becoming an important trend of new generation manufacturing.

In the digital double factory, the factory output and equipment changes can be effectively controlled through the functions of dynamic field monitoring, production process linkage and process abnormality alarm. Zhang Qing introduced that on the WINGplat industrial Internet platform in Wei Ying, the digital dual factory will realize five major integrations of safety and environmental protection, equipment health, supply chain coordination, production control and emergency management, so that traditional industrial enterprises can successfully transform into intelligent manufacturing. In Jiangxi Blue Star Spark Silicone Co., Ltd., with the help of network technologies such as digital twinning and 5G UAV inspection, the production management cost of the enterprise is reduced by 20%, and the process safety pre-judgment efficiency is improved by 80%. In China Sinochem Nantong Chen Xing Synthetic Materials Co., Ltd., the application technology represented by digital twins has helped enterprises to improve production management efficiency by more than 60%.

Fan, vice president of Fiberhome Communication Technology Co., Ltd. said that digital twins are the "meta-universe" of the online world. The intelligent optical network system constructed by digital twinning, artificial intelligence and computing algorithm is open and efficient, which can realize an important value-"on demand": consumers put forward their consumption needs through APP, and "digital twinning" is transformed through computing algorithm, driving the platform and reality to meet the needs at any time.

Digital pairing is also helpful to improve the refined management level of the city. Ye Yuping, chief strategy officer of Softcom Smart Technology Co., Ltd., said that through the establishment of digital twin cities, we can see the running status of real cities in real time and respond flexibly to various emergencies.

It is understood that "exploring the construction of digital twin cities" has been included in China's "Tenth Five-Year Plan", and many ministries and commissions have intensively issued policy documents to standardize and lead the development of technology, application and industry of digital twin cities. Shanghai, Hainan, Zhejiang, Beijing, Shandong and other provinces and cities took the lead in developing the practice of digital twin cities.