With the further construction and speed-up of railways in China, the limitations of analog wireless train modulation system in format and function gradually appear, and it is difficult to meet the needs of railway development. Choosing the digital mobile communication technology system suitable for China railway has become an important decision for railway development.
In 2003, the former Ministry of Information Industry approved the frequency band used by China Railway GSM-R system, paving the way for the comprehensive construction of GSM-R system. In 2004, the former Ministry of Railways decided to adopt GSM-R system as the technical equipment policy of China's railway special mobile communication, outlining a clear industry application demand and market.
Liujie Technology was born under this background. At the beginning of its establishment, Liujie Technology took it as its own duty to promote GSM-R system to "take root" in China railway, and cooperated with the research team of Beijing Jiaotong University to preliminarily determine to carry out technical research, product development and engineering practice in three fields: railway application, network optimization technology and operation and maintenance support of GSM-R system.

Since 2006, GSM-R system has been deployed on all new railway lines in China, and the orderly transition from 450MHz wireless train dispatching system to GSM-R system has been implemented simultaneously on existing railway lines. At this stage, China Railway has carried out the engineering construction and test of GSM-R system on Qinghai-Tibet Railway (Plateau Railway) and Daqin Railway (Heavy Load Railway), combining GSM-R system with the specific application of China Railway, and supporting domestic independent application innovation R & D achievements to realize the introduction, digestion, absorption and application innovation with China railway characteristics.
Liujie Technology has been brave in practice, actively participated in the construction of national key projects of Qinghai-Tibet Line and Daqin Line, took the lead in launching a number of "first set" products serving GSM-R railway communication network, and successfully realized engineering application, making important contributions to the opening and operation maintenance of the line, thus establishing Liujie's professional and reliable brand image.

• From 2005 to 2007: Participated in the construction of Qinghai-Tibet Railway, the first railway line in China to realize train operation control by wireless communication technology. The GSM-R field strength test system, GSM-R road test system, GPRS interface server system and GSM-R interface monitoring system independently developed by Liujie were successfully applied to Qinghai-Tibet Railway, filling the blank in the field of monitoring acquisition and data analysis in GSM-R application.
• From 2005 to 2007:  Liujie participated in the construction of Daqin Heavy Haul Railway, the first heavy haul railway in the world to realize networked locomotive synchronous control by GSM-R technology. Liujie cooperated with Beijing Jiaotong University to creatively develop ground application node device, on-board communication unit, controllable train tail communication unit software and controllable train tail monitoring system in locomotive synchronous control system. The locomotive synchronous control system based on GSM-R network realizes the safe and efficient operation of 20,000 tons heavy load combined train, which is one of the key technologies for upgrading the annual traffic volume of Daqin Railway from 100 million tons to 450 million tons, greatly improving the transportation efficiency of Daqin Railway and effectively relieving the shortage of electric coal in eastern and coastal economically developed areas.
• From 2007 to 2008:  Successfully developed "GSM-R QoS test system" and "GPRS home server" and completed field application, from then on into the ranks of GSM-R core network shared equipment suppliers.

Taking the birth and rapid development of China high-speed railway as an opportunity, Liujie Technology's product pedigree and company scale have grown steadily, forming a series of products and solutions centering on railway private network mobile communication network, establishing a professional and efficient engineering implementation and technical support team covering the national road network, and the products and solutions are widely used in 18 railway bureaus nationwide. In 2016, Liujie Technology successfully connected with the capital market, and the company's scale and development entered a brand-new platform.

• From 2008 to 2009: Participated in the construction of the Wuhan-Guangzhou Passenger Dedicated Line, the first high-speed railway in China with a GSM-R system carrying the CCTS-3 train operation control system and a speed of 350 kilometers per hour. The GSM-R network interface monitoring system of Liujie was successfully applied, and services such as joint commissioning and testing, network optimization, interconnection and interoperability testing, and daily operation and maintenance support were provided.
• In 2012: The market shares of the three major types of products, namely GSM-R network interface monitoring, test instruments and GRIS, exceeded 50% and 70% respectively.
• From 2015 to 2019: The GSM-R network air interface monitoring product was successfully developed and widely deployed and applied in key areas along high-speed EMUs and railway lines.
• From 2016 to 2019: With the attention of the capital market, Jiaxun Feihong (stock code: 300213) completed its acquisition.

Smooth ride out the epidemic-With high-quality service and long-term accumulated brand advantages, Liujie products maintain a high market share in the industry and form a close and stable cooperative relationship with customers. Especially during the three-year epidemic period, the Company overcame many difficulties and made every effort to ensure customer demand, and its performance still maintained rapid growth.

• A series of new products have been successively launched - combining new ICT technologies and the new business demands of railway operation and maintenance, a radio interference monitoring system and a series of 5G private network industry application products have been introduced, including: Railway communication monitoring cloud platform, integrated solution for "5G+ Beidou System application" in railway stations and yards, 5G vehicle-mounted unified transmission platform, 5G service monitoring system and 5G edge cloud platform (MEP), health status assessment and trend prediction system for mobile communication network equipment, etc.
• Further expansion of the company's scale-Chengdu R & D Center, Zhengzhou Office, Taiyuan Office, Guangzhou Office and subsidiaries have been established;
• Further strengthen the core competitiveness of the enterprise-expand the operation and maintenance expert team, continuously help users solve pain points in operation and maintenance, and establish a solid adhesion with users; strengthen the strength of the research team, constantly explore and solve new engineering and technical problems in the development process of the industry; and continuously practice "politics, production, learning, research and application", so as to achieve sustainable development while looking up to the sky.

Standing at the tuyere of railway digital transformation and the change of railway new generation mobile communication system, we will continue to develop and improve railway 5G-R private network-related series products. Establish extensive and in-depth continuous cooperation with national key laboratories and top research teams of universities in the industry, promote leapfrog upgrading of products and services by using cutting-edge technologies such as cloud computing, big data, 5G and artificial intelligence, bring safer, more reliable and efficient use experience to users, grow together with the industry, and continuously contribute to the healthy development and safe operation of railways in China.

• Goals for the next 10 years-"23X":
  2 main lines (broadband and ubiquitous connection + intelligent communication operation and maintenance support)
  3 categories of products (intelligent terminal +MEP+ network digital twin)
  X 5G industry private network application integration capability.