Which prefabricated rod and raw materials are used for the optical fiber inside a fiber optic cable sold from China to other countries? In the past, Wuhan Changfei Fiber Optic Cable Co., Ltd. needed to constantly answer inquiries from customers from various countries regarding this issue. As the world's largest supplier of fiber optic preforms, fibers, and cables, the company's products are sold to over 90 countries and regions. In 2019, Changfei Corporation supported the launch and operation of the first industrial internet identification resolution secondary node in China's optical communication industry. Through the unique "digital ID card" identification on the product, based on identity resolution and blockchain technology, this information can be queried and verified one by one. The identification code with material information will be printed on the optical cable reel, and customers can trace the entire lifecycle of the optical cable product by scanning the code. Behind the convenient technology, China's industrial internet labeling industry is constantly moving towards higher levels. Since the comprehensive implementation of industrial internet construction in 2018, after more than five years of exploration and practice, China's industrial internet identification and resolution system has achieved phased results from scratch, from small to large, and from point to surface. In the face of the future, industrial internet identification analysis will accelerate its development pace and better empower social and economic activities. Building the "nerve hub" of the industrial internet from the beginning to the stage of scale development. The industrial internet is a strategic infrastructure for new industrialization and an important cornerstone of the fourth industrial revolution. Through the comprehensive interconnection of people, machines, and things, it constructs a fully connected, data-driven industrial production, manufacturing, and service system with all factors, industry chains, and value chains. The construction and development of industrial internet is not achieved overnight. With the guidance and support of policies, it has gone through a spiral upward process. The industrial internet identification resolution system is the neural hub of the industrial internet. According to the China Academy of Information and Communications Technology, the industrial internet is linked by an identification resolution system, which is centered around national top-level nodes, connected to international root nodes, secondary nodes, and enterprise nodes. From a timeline perspective, the development of China's industrial internet identification and resolution system has gone through a steady and steady five years. 2018 marks the beginning of the comprehensive implementation of industrial internet construction. The Ministry of Industry and Information Technology has proposed for the first time the "323" action for the development of industrial Internet, which aims to build three major systems: network, platform, and security, promote integrated innovation in large enterprises and popularization of applications in small and medium-sized enterprises, and build three major supports for industry, ecology, and internationalization. In 2019, the development of China's industrial internet entered the fast lane. The supporting capacity of industrial Internet has been greatly improved, and a large number of secondary nodes for identification resolution in different industries are continuously connected to the five top nodes. The integration and application of industrial Internet in various fields of manufacturing are advancing in depth. Multiple industries such as aviation, petrochemicals, steel, household appliances, clothing, and machinery have begun to apply identification analysis, and new models and formats are constantly emerging. In 2020, China's industrial internet innovation and development entered a critical period. The industrial internet is beginning to penetrate more industries and empower digital transformation. 2021 is a year when the industrial internet industry has entered a period of rapid growth. The Ministry of Industry and Information Technology has issued the Action Plan for Innovative Development of Industrial Internet (2021-2023), proposing