Recently, Wang Lixia, deputy secretary of the Party committee of Inner Mongolia Autonomous Region and chairman of the autonomous region, said that during the 14th Five Year Plan period, based on the application scenario of "5g + industrial Internet", it is expected to invest in building five digital workshops and 10 intelligent factories. These planned smart factories are the epitome of 5g fully connected factories. 5g fully connected factory is a specific application scenario of "5g + industrial Internet". The guidelines for the construction of 5g fully connected factories (hereinafter referred to as the guidelines) previously issued by the Ministry of industry and information technology clarified the three-level construction direction of 5g fully connected factories and proposed to build 100 benchmark factories during the 14th Five Year Plan period. According to the analysis of industry experts, 5g fully connected factories are an important part of promoting the digital, intelligent and systematic transformation of the manufacturing industry, with huge investment. In the long run, the advantages outweigh the disadvantages, but supporting policies are still needed to solve the capital problem. Promoting the transformation of the manufacturing industry into a 5g fully connected factory is a specific application scenario of "5g + industrial Internet". A few days ago, the Ministry of industry and information technology held a "5g + industrial Internet" on-site work meeting in Ningbo, Zhejiang Province, with the theme of "5g fully connected factory". At the meeting, 129 5g fully connected factory projects were signed, with a total contract amount of 1.769 billion yuan. A relevant person in charge of the Ministry of industry and information technology said, "this guide is formulated to guide all regions and industries to actively carry out the construction of 5g fully connected factories, drive the development and growth of 5g technology industry, further accelerate the in-depth expansion of '5g + industrial Internet' new technologies, new scenarios and new models to all fields and links of industrial production, and promote the improvement of quality, cost reduction, efficiency increase, green and safe development of traditional industries.". The guide defines the three-level construction direction of 5g fully connected factories: support enterprises to build different types of 5g fully connected factories at the production line level, workshop level and factory level. Production line level 5g fully connected factory construction, focusing on capacity-building in single production links, equipment connection of business units, data collection and 5g integrated application innovation; The construction of workshop level 5g fully connected factory focuses on the collaborative optimization of multiple production lines and systems, the full release of data value, and the improvement of integrated innovation level; The construction of factory level 5g fully connected factories focuses on cross workshop and cross level connectivity, in-depth and systematic application of scenarios, and improvement of total factor productivity. In this regard, Wang Peng, a researcher of the Beijing Academy of Social Sciences and a researcher of the intelligent society governance research center of Renmin University of China, analyzed that, "The 5g fully connected factory is an important link in promoting the digitalization, intelligence and systematic transformation of the manufacturing industry. With 5g, the information infrastructure can be connected, and the industrial Internet, industrial Internet and industrial Internet can promote the development of the manufacturing industry and even the whole transportation, upstream and downstream supply chain and industrial chain intelligence". Steel, mining and other industries are the focus of attention. The guide proposes that during the "14th five year plan" period, it is necessary to promote 10000 enterprises to carry out the construction of 5g fully connected factories, build 1000 classified and graded factories with distinctive characteristics, build 100 benchmark factories, and promote the in-depth development of 5g integrated applications. At the same time, enterprises in more industries are encouraged to actively explore innovative applications of 5g in all aspects of industrial production to achieve quality improvement, cost reduction, efficiency increase, green and safe development