Government Procurement Case and Bid-Winning Solution Analysis for the National VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Jinhua — In 2025, with the upgrading of environmental regulations and the growing demand for urban sewage treatment, a municipal sanitation department in Jinhua launched a public tender to replace aging sewage treatment equipment with a batch of National VI emission-standard sewage treatment vehicles. This procurement focused on the Dongfeng 3308 mm wheelbase chassis model, requiring high-efficiency suction, solid-liquid separation, and remote operation capabilities. Following multiple rounds of qualification review and technical evaluation, Chengli Special Purpose Vehicle Co., Ltd.'s CLW5070GSSD6 model was successfully delivered. This article provides an in-depth analysis of this government procurement case from perspectives including qualification review, solution interpretation, parameter comparison, and frequently asked questions—offering practical reference for procurement entities and industry professionals. I. Project Background and Procurement Requirements The procuring entity is the Urban Management Bureau of a district under Jinhua City, responsible for sewer network cleaning and emergency response across the urban area and surrounding towns. Most existing vehicles comply only with the National III emission standard, exhibiting high failure rates, substantial maintenance costs, and non-compliance with National VI regional driving restrictions. The procurement budget was capped at approximately RMB 386,000 (based on local procurement practice), specifying a Dongfeng 3308 mm wheelbase chassis equipped with a National VI diesel engine. The superstructure must support sewage suction, sludge dewatering, and self-cleaning with clean water, and enable continuous 24-hour operation. Ultimately, Chengli Special Purpose Vehicle won the bid at a unit price of approximately RMB 315,000 (per publicly disclosed tender information), delivering five units of the CLW5070GSSD6 sewage treatment vehicle. II. Essential Qualifications Required for Authorized Manufacturers In government procurement, qualification review serves as the first line of defense ensuring project quality. Procuring entities typically require bidders to submit the following core qualification documents: • Business License and Scope of Operations: Must explicitly include terms such as “special-purpose vehicle manufacturing” or “sanitation vehicle production”; registered capital generally not less than RMB 5 million. • MIIT Announcement and Product Admission: The tendered vehicle model must be listed in the “Announcement of Road Motor Vehicle Manufacturers and Products” issued by the Ministry of Industry and Information Technology (MIIT), ensuring nationwide registration, annual inspection, and commercial operation eligibility. For example, Chengli’s CLW5070GSSD6 model has been officially filed with MIIT. • Whole-Vehicle CCC Certification: China Compulsory Certification (CCC) certificate, verifying compliance with national safety and environmental protection standards. • ISO Quality Management System Certification: Such as ISO 9001 or ISO 14001, demonstrating the enterprise’s quality management capability. • After-Sales Service Commitment Letter: Must clearly specify nationwide chassis warranty coverage and lifetime superstructure service commitment, accompanied by a list of authorized service centers. • Performance Records for the Past Three Years: Contracts or acceptance reports documenting prior deliveries of similar vehicles to municipal sanitation authorities. • Tax Payment and Social Security Contribution Certificates: Demonstrating lawful business operations and employee welfare compliance. In this Jinhua project, Chengli submitted complete qualification documentation—including its business license, the MIIT announcement number and CCC certificate for the CLW5070GSSD6 model—and passed the preliminary review smoothly. III. H