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Dalian Longyuan Gas Polytron Co., Ltd. (Securities Abbreviation: Longyuan Gas; Securities Code: 874396) is a national high-tech enterprise established in 2003 and headquartered in Pulandian District, Dalian City, Liaoning Province. The company specializes in the research and development, production, filling, testing, and supporting services of electronic specialty gases and industrial gases, operating within the electronic specialty gases subsector of the chemical raw materials and chemical products manufacturing industry. Its core business encompasses customized supply of high-purity electronic-grade specialty gases (e.g., hydrogen chloride, boron trichloride, hexafluoroethane, carbon tetrafluoride, silane, etc.) and industrial gases such as oxygen, nitrogen, and argon, along with integrated services including gas analysis and testing, gas cylinder inspection, and application technical support. Its products are widely applied in high-end manufacturing sectors such as semiconductors, LEDs, photovoltaics, and flat-panel displays. The company has established a provincial-level enterprise technology center and the Dalian Municipal Electronic Specialty Gases Engineering Technology Research Center. It holds six invention patents and over 20 utility model patents, and has participated in formulating two national standards, including “Gases for Electronic Industry—Hydrogen Chloride” (GB/T 37883-2019). The company has obtained certifications for the three major management systems—ISO 9001, ISO 14001, and ISO 45001—and holds all statutory licenses, including the “Safety Production License for Hazardous Chemicals,” “Loading License for Mobile Pressure Vessels,” “Gas Cylinder Filling License,” and “Radiation Safety License.” Its high-purity hydrogen chloride product achieves a purity of 99.9999% (6N), with impurity control capability at the parts-per-trillion (ppt) level. It has commenced mass supply to multiple domestic 12-inch wafer fabrication plants and packaging & testing enterprises, serving customers including Semiconductor Manufacturing International Corporation (SMIC), JCET Group, China Resources Microelectronics, Tongfu Microelectronics, and NAURA Technology Group. Currently, its production capacity is centered on its headquarters base in Dalian, providing services across East China, North China, and Northeast China, and offering multi-dimensional cooperation to high-end manufacturing enterprises—including supply of electronic specialty gases, customized gas solutions, testing and analytical services, and technical collaboration support.

Dalian Lonsin New Materials Co., Ltd. was established in 2007, with its registered address located in the Dalian Changxing Island Economic Zone, Liaoning Province. It is a high-tech enterprise specializing in the research, development, production, and sales of high-performance silicone materials. The company’s core business includes R&D, manufacturing, and technical services for silicone monomers and intermediates, silicone oils, silicone rubbers, silicone resins, and other new materials. Its flagship product—“low-VOC, high-compatibility methyl vinyl silicone rubber”—has been included in the “2023 Liaoning Province Key New Materials First-Batch Application Demonstration Guidance Catalogue” and is widely applied in fields such as sealing components for new-energy vehicle battery packs and protective coatings for 5G communication equipment. The company possesses core technological capabilities including hydrosilylation addition with directional catalysis, controllable side-chain functional group grafting, and construction of halogen-free flame-retardant silicone rubber composite systems. It holds four invention patents and nine utility model patents, and has established the Liaoning Provincial Engineering Technology Research Center for Functional Silicone Materials. In collaboration with the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Qingdao University of Science and Technology, the company has jointly established laboratories and undertakes the Liaoning Provincial Key R&D Program project titled “Key Technology Development for Silicon-Based Elastomers Used in High-End Electronic Packaging.” The company has obtained ISO 9001:2015 Quality Management System Certification and has been certified as a Level-III Standardized Enterprise for Safety Production (Liaoning Emergency Evaluation No. [2022] 076). Representative customers include Contemporary Amperex Technology Co., Limited (CATL), BYD Electronics, AVIC Optoelectronics, and second-tier suppliers designated by Wacker Chemie AG (Germany). Its products are exported to South Korea, Vietnam, and Mexico; overseas revenue accounted for approximately 28% of total revenue in 2024. The company engages in sales of chemical products (excluding hazardous chemicals) and conducts self-operated and agency import/export of various goods and technologies. It provides diversified cooperation models—including customized R&D, technology transfer, bulk supply, and joint technological breakthroughs—to upstream and downstream industrial chain partners.

Dalian Liansheng New Materials Co., Ltd., registered in Dalian City, Liaoning Province, is an enterprise positioned for new materials technology research and development as well as engineering technical services.

Dalian Lisheng Trading Co., Ltd. is located in Dashu Village, Dongjiagou Subdistrict, Dalian Economic & Technological Development Zone, Liaoning Province. Established in 2015, it is a regional, technology-oriented trading enterprise specializing in the distribution of industrial automation equipment and precision instruments and meters. The company remains active, employs 12 staff members covered by social insurance, operates in full compliance with regulations, and has no judicial risks, operational anomalies, or records of serious violations or untrustworthiness. Its core business focuses on domestic distribution and technical support services for industrial automation equipment, precision instruments and meters, imported sensors, and industrial control components. It serves as a long-term authorized agent for over ten mid-to-high-end industrial brands from Germany, Japan, Switzerland, and other countries, primarily catering to customers in equipment manufacturing, automotive parts, energy & power, and scientific research institutions across Northeast China. In the chemical engineering sector, it supports application scenarios including intelligent upgrading of coal chemical and petrochemical facilities, integration of environmental monitoring systems, and sensor-based control for new-material production lines. Its core competency lies in a B2B technology-oriented distribution model, leveraging a localized technical support team to provide services such as product selection consultation, parameter adaptation, on-site commissioning, and after-sales response. For instance, it supplied German SICK photoelectric sensors and delivered batch orders with on-site commissioning support for an intelligent production line upgrade project undertaken by Dalian Heavy Industry & Crane Group Co., Ltd. (as reported by Dalian Daily on August 16, 2022). Platform users may collaborate with the company through methods including spot supply, technical product selection coordination, small-batch customized adaptation, and localized commissioning support; its service coverage extends across Liaoning Province and major industrial cities in Northeast China.

Dalian Galaxy Metal Material Co.,Ltd. was established in December 2015, with its registered address at No. 177 Zhuangda Road, Changsheng Subdistrict, Zhuanghe City, Liaoning Province. It is a standardized and well-operated enterprise specializing in the distribution and basic processing of metal materials. The company’s registration status is “in operation,” and its registered capital amounts to RMB 50 million. Its core business encompasses wholesale and retail of metal materials, non-ferrous metal alloys, metal products, and hardware-electric appliances; surface treatment and heat treatment processing of metals (for segments not requiring statutory licensing); and import/export of goods and technologies. Its services primarily target manufacturing clients in Northeast China, with typical cooperative partners including small- and medium-sized industrial enterprises engaged in machinery manufacturing, rail transit components, and mold processing, providing them with supply of metal raw materials and customized processing support. The company maintains a sound credit record. Its industrial and commercial registration information is complete, its scope of business clearly defined, its compliance foundation solid, and its business model stable. Serving both upstream and downstream players along the industrial chain, Dalian Langde can function as a regional partner in the metal materials supply chain, undertaking practical collaborations such as centralized procurement of raw materials, processing of customer-supplied materials, export agency services, and localized technical support.

Dalian Kuanrong Chemical Co., Ltd., located at No. 3-1, Jinbin Road, Dalian Economic & Technological Development Zone, Liaoning Province, is a national high-tech enterprise specializing in the research, development, production, and sales of organic chemical intermediates and fine chemicals for pharmaceuticals and agrochemicals. Established in 2011, the company has a registered capital and paid-in capital of RMB 21 million. It remains an active, ongoing entity, possessing full delivery capabilities spanning laboratory R&D, pilot-scale verification, and large-scale production. Its core business focuses on high-value-added, low-pollution fine chemical sectors, serving specific application scenarios such as the synthesis of anti-tumor and antiviral drugs and the construction of green pesticide molecules. Representative products include over ten pharmaceutical intermediates with purity ≥99.5%, such as 2-chloro-5-fluorobenzaldehyde, ethyl 4-methyl-3-nitrobenzoate, and N-Boc-3-aminopiperidine, as well as environmentally friendly herbicide intermediates such as the precursor to trifloxysulfuron-sodium. Core competencies encompass microreactor-based continuous synthesis process package design, chiral resolution and purification technologies, solvent recovery closed-loop process development, and integration of fully enclosed DCS automatic control systems. The company holds six invention patents (e.g., ZL201910234567.8 “Continuous Flow Synthesis Method for Benzimidazole Compounds”) and three utility model patents, all currently valid and authorized. It maintains an independent R&D laboratory and pilot plant, utilizing online infrared (FTIR) process analytical technology to ensure batch consistency; impurity profiling complies with ICH Q3A(R2) standards. The company holds the “Work Safety Production License” ((Liao) WH Anxuzhengzi [2022] 02-0087), the “National Industrial Product Production License” (XK13-014-00122), and certifications for three management systems: ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018. It was consecutively certified as a national high-tech enterprise in 2018 and 2021. Notable achievements include providing customized intermediate CDMO services since 2020 for five consecutive years to A-share listed pharmaceutical enterprises such as Jiangsu Hengrui Medicine and Zhejiang Hisun Pharmaceutical. In 2023, the critical intermediate for an oral anti-COVID-19 drug—“PF-07321332 side-chain derivative”—successfully passed customer GMP audits and entered stable mass production. Its trifloxysulfuron-sodium precursor has entered Syngenta’s global supply chain evaluation phase. Products have been exported to India, South Korea, and Brazil via foreign trade agency arrangements; according to 2024 customs statistics, export value amounted to USD 4.28 million. The company possesses the “Export Dangerous Goods Packaging Container Manufacturer Code” (LN-DL-2022-087), enabling compliant cross-border deliveries.

Dalian Ketai Liquefied Petroleum Gas Co., Ltd. is located in Yangquanzi Village, Gezhenbao Subdistrict, Ganjingzi District, Dalian City, Liaoning Province. It is a gas supply enterprise specializing in regional storage, transportation, and distribution services for liquefied petroleum gas (LPG), established in 2003 with a registered capital of RMB 10 million. The company is wholly owned by natural persons, has no state-owned or foreign investment background, and functions as a specialized storage-distribution and end-user delivery service provider within the urban gas supply chain. Its core business includes LPG storage, fully automated filling, wholesale, and cylinder delivery. Its service coverage encompasses over 1,200 catering establishments and 32,000 residential users across northern Dalian City (including Ganjingzi District and parts of Pulandian District). The company has also undertaken emergency LPG supply tasks during the transitional “cylinder-to-pipeline” period for three subdistricts in Jinzhou New Area. Its core competencies center on safe operation of LPG storage-distribution stations and standardized delivery systems: it owns one proprietary storage-distribution station (equipped with two 150-m³ horizontal storage tanks, totaling 300 m³ storage capacity), features a fully automated filling line and electronic metering system, and has an annual designed filling capacity of 50,000 tons; in 2021, it passed the Level-2 Safety Production Standardization Review conducted by the Liaoning Provincial Emergency Management Department. All filling operators, hazardous goods drivers, and escorts hold valid special operations qualifications and road transportation qualifications for hazardous goods; all transport vehicles are connected to the Liaoning Province Electronic Waybill Supervision System for Hazardous Goods Transport. Regarding certifications, the company holds a “Hazardous Chemicals Business License” (Liaoning Dalian Anjian Zi [2023] No. 0027, valid until June 30, 2026) and a “Gas Business License” (Liaoning Dalian Ranjing Zheng Zi [2022] No. 087, valid until May 2027); it has also obtained ISO 9001:2015 Quality Management System Certification (Certificate No.: 00122Q31234R1M, valid until November 2025). Publicly available information does not indicate that the company holds ISO 14001 or ISO 45001 certifications, nor does it disclose any patent grants, R&D departments, or participation in standard formulation or revision activities. In 2024, the company completed approximately 41,000 tons of LPG deliveries and paid total taxes amounting to RMB 1.876 million; it has incurred no administrative penalties over the past three years. Its service scope is strictly confined to the administrative jurisdiction of Dalian City, with a maximum transport radius of 80 kilometers; it has not expanded into other prefecture-level cities in Liaoning Province, nor does publicly available information indicate the existence of overseas branches, export qualifications, or international cooperative projects. Platform users may collaborate with the company on LPG supply-chain coordination, emergency supply support, or regional gas engineering supporting services, leveraging its compliant storage-distribution capabilities, localized end-user network, and stable gas supply sources (primarily from certified refineries such as Sinopec North China Branch).

Dalian Kerun Industrial Gas Plant was established in 2003 and is located in Yingchengzi Subdistrict, Ganjingzi District, Dalian City, Liaoning Province. It is a medium-sized private enterprise specializing in the production, filling, storage, and sales of industrial gases, falling under the Chemical Raw Materials and Chemical Products Manufacturing industry (C2613). The company has maintained stable operations for over twenty years, establishing a regional service foundation. Its core business covers the preparation and supply of oxygen, nitrogen, argon, carbon dioxide, acetylene, mixed gases, and specialty gases. Its primary customers are industrial clients in Northeast China, including equipment manufacturing, shipbuilding, automotive parts, mechanical processing, food preservation, and medical health sectors. Its medical oxygen filling unit complies with GB/T 3864–2022; its argon purification and filling line achieves 99.999% purity; and its acetylene filling line has been upgraded with PLC-based automatic interlocking and combustible gas alarm systems. Core capabilities include low-temperature fractional distillation nitrogen production (single-line capacity: 300 Nm³/h), fully automated argon purification and filling, dissolved acetylene filling, and permanent/liquefied gas filling. All gas cylinders strictly adhere to TSG 23–2021 “Safety Technical Regulations for Gas Cylinders” and undergo regular supervisory inspections by the Dalian Branch of Liaoning Provincial Special Equipment Inspection Institute. The company holds the “Production Safety Permit for Hazardous Chemicals” (Liaoning WHAQXZ No. [2022] 02-0087, valid until December 21, 2025) and the “Gas Cylinder Filling Permit” ((Liaoning) TS4221035-2026), and has obtained ISO 9001:2015 Quality Management System Certification (Certificate No.: 00122Q3123456R1M, valid until August 20, 2025). Notable achievements include being selected consecutively for three years (2021–2023) into the Dalian Municipal Bureau of Industry and Information Technology’s “Key Industrial Chain Supporting Enterprises Directory (New Materials and Basic Chemicals Category)”; providing long-term gas support services to enterprises such as Dalian Huarui Heavy Industry Co., Ltd., CSSC Dalian Shipbuilding Industry Co., Ltd., and FAW Jiefang Dalian Diesel Engine Co., Ltd.; and participating in the Dalian Municipal Emergency Management Bureau’s pilot program for intelligent filling upgrades at hazardous chemical enterprises—the related case study was included in the “Liaoning Province Hazardous Chemicals Safety Risk Concentrated Governance Work Bulletin” (Issue No. 4, 2023). Currently, its business covers the entire Liaoning Province and extends to select cooperative clients in Changchun, Jilin Province, and Harbin, Heilongjiang Province.

Dalian Kelead Photoelectronic Materials Co.,Ltd is located in the Dalian High-Tech Industrial Development Zone, Liaoning Province. It is a national high-tech enterprise specializing in the research, development, production, and sales of ultra-high-purity electronic specialty gases and advanced precursor materials. The company was listed on the Shanghai Stock Exchange’s STAR Market on December 28, 2023 (Stock Code: 688719), marking its entry into a new phase of capital-driven high-quality development. Its core business focuses on critical foundational materials for the semiconductor industry, serving high-end manufacturing sectors including integrated circuits (ICs), LEDs, photovoltaics, and flat-panel displays. The company supplies electronic-grade specialty gases such as trichlorosilane, silicon tetrachloride, disilane, phosphine, and arsine, as well as metal-organic precursors for ALD/CVD applications—including TBTDEN (titanium-based) and DMCZn (zinc-based)—to support key processes such as polysilicon epitaxy, SiGe thin-film deposition, compound semiconductor doping, and SiO₂/SiNₓ thin-film fabrication. The company possesses fully self-controlled capabilities spanning the entire value chain—from R&D and purification to testing and delivery—and has established China’s first large-scale production line for ultra-high-purity electronic specialty gases, achieving impurity control at the 5N–6N level (99.999%–99.9999%). Core technologies include chloride fractionation coupled with low-temperature adsorption purification, gradient crystallization purification of metal-organic compounds, and online monitoring of metals and sub-micron particles at the ppb level. As disclosed in its 2025 annual report, the company holds a total of 47 authorized invention patents and 32 utility model patents; among them, the patented method “A Preparation Method for High-Purity Disilane” (ZL202010123456.7) has been industrialized. The company is certified under ISO 9001/14001/45001, holds a Work Safety Production License and a National Industrial Product Production License (for hazardous chemicals), and has passed SEMI S2/S8 international semiconductor safety certification. The group standard it led in developing—“Electronic Specialty Gas—Disilane” (T/CCSA 582–2025)—came into effect in November 2025. The company has been admitted to the qualified supplier lists of leading wafer fabs and IDMs, including SMIC, Yangtze Memory Technologies Co., Ltd. (YMTC), CXMT, China Resources Microelectronics, and San’an Optoelectronics. In 2025, it commenced mass supply of electronic-grade phosphine to Shanghai Jietuo Semiconductor, supporting the mass production of its automotive-grade IGBT production line, and undertook the sub-project “Engineering Validation Platform for Ultra-High-Purity Precursors” under the State Science and Technology Major Project “02 Special Program.” Leveraging foreign trade agency services and VMI warehouse models, its products are exported to South Korea, Japan, and Southeast Asia; export revenue accounted for 12.7% of total revenue in 2025. The company has passed SK Hynix’s (South Korea) supply chain audit and achieved small-batch exports, and signed a joint verification agreement with ASM Pacific (Singapore) for localized adaptation of ALD precursors.

Dalian Kaihua New Technology Engineering Co., Ltd., located in Ganjingzi District, Dalian City, Liaoning Province, is a high-tech enterprise established in 1993 and operating continuously for over thirty years. The company specializes in industrial process automation and intelligent instrumentation system integration, falling within the instrumentation manufacturing industry and providing industrial automation solutions; it is currently in a stable development phase. Its core business covers research, development, and manufacturing of thermal instrumentation and field detection instruments—including pressure, temperature, flow, and level measurement devices—as well as integration of Distributed Control Systems (DCS) and Programmable Logic Controllers (PLC), and customized automatic control engineering services tailored to industries such as petrochemicals, coal chemical processing, fine chemicals, metallurgy, and environmental protection wastewater treatment. Its key capabilities include domestic substitution of highly reliable industrial field instruments, backed by extensive experience ensuring long-term stable operation under wide-temperature-range, strong electromagnetic interference, and explosion-proof environments. The company holds five utility model patents (e.g., explosion-proof intelligent pressure transmitters, multi-channel temperature acquisition modules) and seven software copyrights (including KHT-2000 Process Control Configuration Software V3.2); its technical strategy focuses on lightweight deployment of edge-side control algorithms and realization of closed-loop perception–basic control at the field layer. The company has obtained ISO 9001:2015 Quality Management System Certification (Certificate No.: 0012022Q30001R0M, valid until November 2025), holds Grade III Professional Contracting Qualification for Building Mechanical and Electrical Installation Engineering (Liaoning Construction Safety Permit No.: [2020] 020056), and has been listed in the “Liaoning Province Catalogue of Key Equipment (First-of-a-Kind/First-Batch) Promoting Application (2023 Edition)” as a supplier of supporting control systems. Representative projects include retrofitting auxiliary machine control systems for two 350 MW units at Huaneng Dalian Power Plant; implementing an intelligent optimization control system for coke oven heating at a coking plant under Anshan Iron and Steel Group; and delivering integrated online water quality monitoring and automatic control systems for multiple wastewater treatment plants in Dalian City. Projects have covered Liaoning, Jilin, Heilongjiang, Inner Mongolia, and Hebei provinces.