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Guangdong Xintongshi Group Co., Ltd.
Guangzhou Casselin Trading Co., Ltd.
Global Sales & Marketing Arm
Guangdong Xintongshi Group Co., Ltd. (Brand: TONGSHI) is a national high-tech enterprise specializing in full-series automotive thermal management cooling components, founded in 2004. For over 20 years, we have focused on R&D, independent manufacturing and global supply of auto radiators, condensers, heaters, intercoolers, oil coolers, new energy thermal parts and mechanical heat exchange products.
Led by Chairman Wang Zhouping, we stick to the spirit of daring to innovate and leading the industry, delivering one-stop cooling system solutions for aftermarket distributors, OEM/ODM partners, machinery and generator manufacturers across 120+ countries worldwide. Guangzhou Casselin Trading Co., Ltd. serves as the group's dedicated international trading subsidiary, responsible for global brand operations and overseas customer services.
This is an era of technological breakthrough and global collaboration. We dare to dream, dare to innovate, dare to strive for industry top ranking. Xintongshi takes every step forward with courage, chasing excellence hand in hand with all global partners.
Company History
Over two decades of continuous growth and expansion, from a single factory to a nationwide manufacturing group with global market presence.
Focus On Car Cooling System
Our Purpose
Guided by a clear mission and a bold vision, driving continuous innovation and sustainable growth.
Provide reliable, cost-effective full-series automotive cooling thermal solutions for global auto aftermarket and OEM partners, reduce procurement risks and operating costs for every client, and achieve win-win long-term growth together.
Build a world-leading one-stop automotive thermal management brand, continue to lead the innovation of auto cooling system industry, let "Made in China TONGSHI" be trusted by global vehicle owners and auto spare parts partners.
Growth Journey
Scroll horizontally to explore every milestone in our 20+ years of development.
Founded in Guangzhou, starting copper and aluminum radiator manufacturing business.
Moved to Tangtang Town, Fogang County, renamed as Fogang Xin Tongshi Auto Radiator Co., Ltd.
Launched auto radiator tube manufacturing line for vertical integration.
Passed ISO/TS16949:2009 Quality Management System certification.
No.2 Factory completed, became member of NARSA International Heat Transfer Association.
Started heater core and condenser manufacturing lines, expanding product portfolio.
Renamed as Guangdong Xin Tongshi Vehicle Thermal System Co., Ltd., established R&D Institute.
No.3 Factory completed. Launched ERP management system to improve delivery performance.
Adopted Ameba Management Pattern, moving toward collectivized management operation.
Opened branches in Vietnam and UAE with offices and warehouses. Deployed automated equipment.
Started evaporator manufacturing line and launched CRM Customer Resource Management System.
Established Guangdong Xinya AC, Jiangsu Heat Exchange, and Hunan Tongshi Heat Exchange.
Launched Chengdu, Qingyuan, Jiangsu trading companies and Xinya Equipment Sales.
Founded Suqian Xinhong Packing Material Co., Ltd., extending supply chain integration.
Established Xin Tongshi Tube Industry, Precision Hardware, and RadiCore Trading.
Launched Topsy Trading, RadiCore Trading, and Starmax Trading, expanding domestic network.
Founded in Guangzhou, starting copper and aluminum radiator manufacturing business.
Moved to Tangtang Town, Fogang County, renamed as Fogang Xin Tongshi Auto Radiator Co., Ltd.
Launched auto radiator tube manufacturing line for vertical integration.
Passed ISO/TS16949:2009 Quality Management System certification.
No.2 Factory completed, became member of NARSA International Heat Transfer Association.
Started heater core and condenser manufacturing lines, expanding product portfolio.
Renamed as Guangdong Xin Tongshi Vehicle Thermal System Co., Ltd., established R&D Institute.
No.3 Factory completed. Launched ERP management system to improve delivery performance.
Adopted Ameba Management Pattern, moving toward collectivized management operation.
Opened branches in Vietnam and UAE with offices and warehouses. Deployed automated equipment.
Started evaporator manufacturing line and launched CRM Customer Resource Management System.
Established Guangdong Xinya AC, Jiangsu Heat Exchange, and Hunan Tongshi Heat Exchange.
Launched Chengdu, Qingyuan, Jiangsu trading companies and Xinya Equipment Sales.
Founded Suqian Xinhong Packing Material Co., Ltd., extending supply chain integration.
Established Xin Tongshi Tube Industry, Precision Hardware, and RadiCore Trading.
Launched Topsy Trading, RadiCore Trading, and Starmax Trading, expanding domestic network.
Dedicated international sales & marketing subsidiary, bringing TONGSHI's manufacturing excellence to worldwide markets.
Subsidiary of Xin Tongshi Group
Guangzhou Casselin Trading Co., Ltd. was established in Guangzhou in 2013 as the dedicated international trading subsidiary of Guangdong Xintongshi Group. We specialize in global sales, brand operation and overseas customer services for the full range of automotive cooling system products manufactured by our parent group.
With more than 18,000 models across almost 58 series — including radiators, intercoolers, condensers, heater cores, oil coolers and evaporators — we cover passenger cars, heavy duty vehicles, generators, forklifts and tractors. Certified to IATF 16949 with 15 manufacturing patents, we ensure consistent quality in every shipment.
Backed by the group's fully self-supplied production chain, we release up to 20 new models per month and accept custom orders from clients' drawings or samples, including OEM and OES. Our products reach 120+ countries across Japan, Saudi Arabia, Africa and North America. Casselin insists on taking the market as the guide.
Our Competitive Advantages
Unmatched manufacturing expertise, rigorous quality standards, and global reach — delivering reliable cooling solutions that power your business growth.
Most manufacturers only produce single product lines, while we cover all cooling system parts. Clients can complete all radiator, AC and intercooler purchases in one order, reducing multiple supplier communication, logistics and warehousing costs. Flexible MOQ of 10pcs per model supports small batch trial orders and bulk mass orders simultaneously.
Annual segmented capacity: brazed radiator 4.31 million units, heater 1.4 million units, condenser 950,000 units, mechanical & engineering radiators 400,000 units. Digital lean production and fully automated FANUC robotic lines support steady mass output, effectively solving the out-of-stock & delivery delay pain points troubling most distributors.
We implement IATF16949 full-process quality management and own CNAS accredited professional testing lab. All products pass multi-cycle pressure, leak-proof, high-low temperature aging tests. Clear warranty policy: 2-year warranty for radiators, 18-month warranty for condensers, greatly lowering customers' after-sales compensation and complaint risks.
50-person professional R&D team with 30+ authorized patents (invention, utility model & design). We support drawing & sample development, private logo branding, customized plastic tank and pipe fitting machining. Help clients build exclusive own brand products to differentiate from homogeneous competitors in local market.
Overseas branches in Vietnam, Malaysia, Laos operate self-owned warehouses with spot inventory. Local teams provide same-day delivery, local technical consultation and after-sales support, shortening lead time for Southeast Asian clients and lowering cross-border logistics pressure.
We accumulate complete model data for European, American, Japanese, Korean, Chinese domestic and engineering machinery vehicles. Our sales team can quickly match OE numbers and vehicle models for clients, avoiding wrong model ordering errors.
What We Offer
Comprehensive cooling system product portfolio serving diverse global client types with professional OEM/ODM capabilities.
State-of-the-Art Infra
200,000+ square meters of total factory area with full independent production chains, supporting mass global export orders.
Xin Tongshi Group owns four standardized modern manufacturing bases distributed across Guangdong, Jiangsu, Hunan and Guangxi.
Full independent production chains covering stamping, brazing, injection molding and finished product assembly.
Manufacturing Excellence
Precision machines operating under systematic production workflows across six specialized workshop divisions.
Radiator Workshop
Dedicated manufacturing line for heavy-duty, passenger, and custom-ordered mechanical water radiators.
Tube Making Workshop
High-precision cold roll forming mills and cutting machinery producing high-frequency welded tubes.
Heater Core Workshop
Controlled atmosphere continuous brazing lines producing high-efficiency vehicle cabin heating modules.
Hardware Workshop
Equipped with custom stamping press matrices to format aluminum plates, bracket plates and brackets.
Mould Workshop
Precision tooling center for rapid model updates and high-spec client mold customizations.
Plastic Tank Workshop
Heavy-duty plastic injection machines molding structural PA66 GF30 heat-resistant tanks.
How We Deliver
Full-link industrial capacity backed by R&D, intelligent manufacturing, rigorous quality control and global service capabilities.
Quality Assurance
Industry-leading certifications and official recognitions that validate our commitment to excellence in automotive thermal management.
Automotive QMS
Patent Office
Patent Office
Patent Office
Patent Office
Patent Office
Officially recognized national high-tech enterprise status
Provincial-level R&D center for auto heat exchanger technology
Guangdong province recognized innovation demonstration enterprise
Guangdong provincial doctor workstation & expert workstation
ISO/IEC 17025 certified national testing laboratory
Intellectual Property Management System Certification
2 Invention, 24 Utility Model & 4 Design Patents
2024 award for high-efficiency anti-corrosion auto radiator
Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.