CN6 Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Zunyi: Government Procurement Case and Winning Bid Solution Analysis In municipal sanitation project procurements across Zunyi, the CN6 Dongfeng 3308 mm wheelbase sewage treatment vehicle has become a key procurement model across multiple batches—thanks to its compact body, high-efficiency sewage treatment capability, and design optimized for southern China’s hot-humid climate. Based on real government procurement cases, this article provides procurement entities with a comprehensive reference—from qualification review and product configuration to field performance and winning bid solutions. I. Case Background: Procurement Record of a Municipal Sanitation Department in Zunyi In 2025, a municipal sanitation department in Zunyi issued a public tender to procure three units of the CN6 Dongfeng 3308 mm wheelbase sewage treatment vehicle, targeting urban sewer network desilting and emergency response needs. The project budget was capped at approximately RMB 401,000 per unit, requiring vehicles with strong suction capacity, efficient solid-liquid separation, and rapid transfer capability—and specifically designed to withstand Zunyi’s hot-humid environment, characterized by high temperatures, frequent rainfall, and year-round humidity exceeding 70%. After multiple rounds of qualification review and technical proposal evaluation, Chengli Special Purpose Vehicle Co., Ltd. delivered the CLW5070GSSD6 model sewage treatment vehicle (built on the Dongfeng 3308 mm wheelbase chassis). This vehicle complies with China VI emission standards; its superstructure features high-strength anti-corrosion coating, and critical sealing components are made from heat- and humidity-resistant rubber—effectively mitigating corrosion and wear caused by frequent rainy-season operations. According to publicly disclosed tender information, the unit price was approximately RMB 328,000, well within the budget ceiling. II. Qualification Review: Essential Documentation Checklist for Authorized Manufacturers & Verification Methods Qualification review is the first critical step in government procurement. Below is the mandatory checklist procurement entities must verify for authorized manufacturers: • MIIT Announcement Catalog: Confirm whether the vehicle model is listed in the 'Announcement of Road Motor Vehicle Manufacturers and Products'—e.g., Chengli’s CLW5070GSSD6 model. • CCC Certification: The vehicle must pass China’s Compulsory Certification (CCC). • Environmental Information Disclosure: China VI-compliant models must have their emission data publicly registered on the Ministry of Ecology and Environment’s official website. • Production License: Special-purpose vehicle manufacturers must hold a production qualification certificate issued by provincial or higher-level departments of industry and information technology. • After-sales Service Commitment: Written confirmation is required for terms such as nationwide Dongfeng chassis warranty and lifetime superstructure service. How to Quickly Verify Production Authorization? Use the MIIT official website’s 'Road Motor Vehicle Manufacturer and Product Information Query System', entering either the enterprise name or model number. For example, searching ‘Chengli’ yields full technical specifications—including all 108 parameters of the CLW5070GSSD6—ensuring legal compliance and authenticity. III. Chengli’s Qualification Highlights: Compliance and Proven Capability Chengli Special Purpose Vehicle Co., Ltd., headquartered at the Chengli Automobile Industrial Park in Suizhou, Hubei Province, ranks among China’s largest special-purpose vehicle manufacturers. Its qualifications include: • Coverage of 946 product entries across 44 categories in the MIIT Announcement Catalog—including water-sprinkling trucks and sewage treatment vehicles. • Service to over 500 municipal sanitation entities; among 114 verified public tenders, Chengli directly won 31 bids