SHANDONG LONGERTEK TECHNOLOGY CO., LTD.

Longertek Technology Co., Ltd. is a high-tech enterprise with advanced core technologies in variable frequency energy saving and refrigeration system control. Founded in 2000, it was listed on the Growth Enterprise Market of Shenzhen Stock Exchange in June 2019, with the stock code 300594. The company has a registered capital of 91.87345 million yuan and over 1,000 employees. Its main business covers the research and development, production, sales and after-sales maintenance services of air conditioning for rail transit vehicles, air conditioning for new energy vehicles and intelligent thermal management products, air source heat pump drying equipment, digital energy intelligent environmental control products and their control systems. The company has subsidiaries including Qingdao Langjin New Energy Equipment Co., Ltd., Shenyang Langjin Technology Co., Ltd., Chengdu Langjin Transportation Equipment Co., Ltd., Suzhou Langjin Rail Transit Equipment Co., Ltd., Guangzhou Langjin Rail Transit Equipment Co., Ltd., Foshan Langjin Rail Transit Equipment Co., Ltd., and Shenzhen Langjin Intelligent Equipment Co., Ltd. 

Longertek Technology, relying on its variable frequency technology for rail transit air conditioning, has achieved energy savings and emission reduction of over 30%, making it a dedicated practitioner of energy conservation and environmental protection in China. As a high-end manufacturing enterprise, its main customer base includes the six major rail vehicle manufacturers of CRRC, Alstom, Bombardier, CAF, Italian Olimpia, Taiwan Sanyo, and Beijing Jingdiao. Up to now, the company's variable frequency air conditioning products for rail transit vehicles have been put into use in 49 cities across 34 provinces, municipalities and autonomous regions including Beijing, Shanghai, Chongqing, Guangdong, Gansu, Shaanxi, Guangxi Zhuang Autonomous Region, Jiangsu and Shandong. 

With China's railway construction entering a new stage, the technological level of China's railway equipment has reached the forefront of the world. The rail vehicle air conditioners of Langjin Technology have been exported to many countries through overseas bidding and cooperative development, such as New Zealand, Thailand, Turkey, Malaysia, Romania, Brazil, France, Sweden, the United States, Italy, the Philippines, and Colombia. Through independent overseas bidding and cooperative development, the company has become a qualified supplier of international well-known rail vehicle companies such as Alstom and CAF of Spain. It has a stable and high-quality customer base both at home and abroad in the rail transit industry. 

With over 20 years of deep involvement in the rail transit industry, the company has accumulated a wealth of core technologies and operational experience. It always centers on the customer and is committed to providing them with energy-efficient, technologically advanced green products. It has successively obtained multiple professional certifications both at home and abroad, including ISO 22163 International Railway Industry Standard Certification, IATF 16949 Automotive Industry Quality Management System Certification, DIN6701 Adhesive Quality System Certification, SIL2 Software Product Safety Level Certification, and GB/T 29490 Intellectual Property Management System Certification. It was consecutively included in the "National Key Energy-saving and Low-carbon Technology Promotion Catalogue" by the National Development and Reform Commission in 2015, 2016, and 2017. Core technical personnel participated in the compilation of the "National Standard of the People's Republic of China: Urban Rail Transit Vehicles - Air Conditioning Systems" (GB/T44288-2024) issued by the State Administration for Market Regulation and the Standardization Administration of China. In recent years, the company has actively engaged in the development of energy conservation and emission reduction-related fields, increased R&D investment, and as of 2024, it holds 326 authorized patents. Externally, it has received a silver rating in the EcoVadis Corporate Social Responsibility Assessment based on the energy-saving and emission-reduction benefits brought by variable frequency heat pump technology. Internally, it has established intelligent manufacturing lines to reduce carbon footprints. It has been recognized as a "Specialized, Refined, Unique, and Innovative Enterprise" in Shandong Province, a "National Specialized, Refined, Unique, and Innovative Small Giant Enterprise", a "National Demonstration Enterprise for Single Champions in Manufacturing", a "National Model Workers' Home", and a "National Intellectual Property Advantage Enterprise". This enhanced awareness of energy and environmental protection constantly guides the company's future towards digital and intelligent energy development, contributing to the realization of the "dual carbon" goals and shouldering social responsibilities. 

Guided by its corporate culture, the company adheres to the vision of "enhancing human life quality through technology and innovation", and upholds the core values of independent research and development of core technologies and "Lanjing-made = crafted with care". It continuously builds the brand influence of Lanjing. By leveraging its independently developed core technologies such as frequency conversion energy-saving control, weight reduction, noise reduction, and intelligence in rail vehicle air conditioning, the company has deeply cultivated the rail vehicle air conditioning industry. While maintaining its leading position in urban rail vehicle air conditioning, it has also expanded into national trunk railways, intercity and regional railways, high-speed rail air conditioning, and overseas rail vehicle air conditioning fields, striving to achieve industry leadership. At the same time, the company fully exploits its self-developed core frequency conversion energy-saving technology advantages, and continues to explore and research to develop new business segments, constantly creating new growth and profit points in new fields such as new energy, precision computer rooms, energy storage temperature control, heat pump drying, heat pump heating, and intelligent operation and maintenance, to achieve sustainable development and shape a world-class brand of "high-end refrigeration energy-saving temperature control equipment". Lanjing belongs to China, and Lanjing belongs to the world!