Guangzhou Casselin Trading Co., Ltd., established in Guangzhou in 2013, serves as the global sales and marketing arm of the Guangdong Xintongshi Group Co., Ltd. We are both a trading entity and an integrated manufacturer, operating as the group's direct export channel while owning and managing our production facilities.
We specialize in automotive spare parts under our brand "TONGSHI" and offer OEM/ODM services for customer brands. Our market covers over 120 countries and regions, including Japan, the Middle East, Africa, and South America.
Our product portfolio comprises nearly 58 series with more than 18,000 models, covering radiators, intercoolers, condensers, heater cores, oil coolers, evaporators, radiator cooling fans, and compressors. These products are engineered for passenger cars, heavy-duty vehicles, buses, generators, forklifts, and agricultural tractors.
As an IATF 16949-certified manufacturer, we hold multiple invention patents for core structures and design patents for product appearance. Our strength lies in vertical integration: we own 4 factories with a total area of over 160,000 m2 and a workforce of more than 1,800 employees, producing tubes, fins, tanks, and complete assemblies in-house, from raw materials to final testing, ensuring quality and on-time delivery.
We are your trusted partner for durable, cost-effective thermal management solutions, backed by both manufacturing substance and global trade expertise.
