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　　Hunan Zhengding Environmental Technology Co., Ltd. (ZDET) was founded in 2009 and is recognized as a National High-Tech Enterprise, a specialized, refined, distinctive, and innovative SME in Hunan Province, and a contract‑honoring, credit‑worthy enterprise in the province. The company is registered in Yuhua District, Changsha City, Hunan Province, with its production base located in the Yuhu High‑Tech Industrial Development Zone of Xiangtan City, and it is a member of the Huashi Group.
　　Zhengding Environment specializes in the research, development, and application of energy-saving and emission-reduction technologies, with a deep focus on energy efficiency and consumption reduction in the ventilation and drying processes of the paper-making industry. The company offers end-to-end services covering system design, equipment manufacturing, installation and commissioning, as well as import and export trade for both new construction and retrofit projects.
　　Our core product lineup includes enclosed hood systems, Yankee hood systems, heat recovery systems, dust collection systems, plant ventilation systems, drying cylinders, paper‑stabilizing air boxes, through‑air drying (TAD), steam condensate recovery systems, air diverters, and hot‑air systems—among other essential papermaking equipment.
　　The company’s products and services now serve dozens of countries and hundreds of paper‑making enterprises worldwide, and it remains steadfast in its commitment to “putting customer satisfaction first,” creating value for clients through high‑quality products and professional services, and supporting the nation’s strategic goals of peaking carbon emissions and achieving carbon neutrality.