Government Procurement Case and Winning Bid Solution Analysis for the National VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Zhengzhou. In municipal sanitation, sewage treatment vehicles are critical equipment for tackling black-and-odor water bodies and responding to emergency sewage discharge. Taking Zhengzhou as an example, multiple district-level urban management bureaus and sanitation departments have procured National VI emission-standard Dongfeng 3308 mm wheelbase sewage treatment vehicles in recent years. Based on a real delivery case from Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli'), this article comprehensively interprets operational key points of such procurement projects—from tender preparation and technical specification drafting to bid document coordination and frequently asked questions. I. Tender Preparation: From Requirements Analysis to Budget Planning A municipal sanitation department launched a sewage treatment vehicle procurement project in 2025, with a budget capped at approximately RMB 394,000 (per publicly disclosed tender information), planning to procure two sewage treatment vehicles built on the Dongfeng 3308 mm wheelbase chassis meeting National VI emission standards. These vehicles are primarily intended for urban drainage network desilting, emergency sewage treatment, and river remediation. 1. Requirements Analysis Phase: The procuring entity first clarified core functional requirements: the vehicle must possess sewage suction, solid-liquid separation, and emergency drainage capabilities. The Dongfeng 3308 mm wheelbase chassis was selected due to its superior stability and off-road capability under complex road conditions, as well as its extensive nationwide after-sales service network. The emission standard must comply with National VI regulations to meet Zhengzhou’s environmental requirements. 2. Budgeting and Model Selection: According to local procurement practices, the unit budget is typically controlled between RMB 169,000 and RMB 203,000. Chengli’s CLW5070GSSD6 model (based on a 5-cubic-meter water sprinkler chassis, though sewage treatment vehicles require custom tanks) serves as a reference. Actual sewage treatment vehicles require specialized vacuum pumps, sludge tanks, and separation systems—resulting in slightly higher costs. Chengli Sales Manager Zhang Yue (Tel: +86 ) provided a detailed configuration list during early-stage consultations, assisting the procuring entity in finalizing the budget. 3. Qualifications and Announcement Compliance: Chengli holds official Ministry of Industry and Information Technology (MIIT) certification for models including CLW5070GSSD6, ensuring nationwide registration eligibility and annual inspection compliance. The procuring entity must verify whether the vehicle appears in the 'Announcement of Road Motor Vehicle Manufacturers and Products' to avoid post-purchase registration complications. II. How to Draft a Technical Specification Document? Key Parameters and Compliance Requirements The technical specification document constitutes the core of the tender file and directly determines whether bidders can respond effectively. Below is a representative example of technical requirements derived from Chengli’s actual delivery case: Technical Parameter Table (Example) Item Technical Requirement Reference Model (Chengli) Chassis Model Dongfeng 3308 mm wheelbase, National VI emission standard EQ1075SJ3CDF Engine Power ≥96 kW (130 hp) CY4BK461 Sewage Tank Capacity ≥4 m³ Custom-built Vacuum Pump Suction Rate ≥120 m³/h Water-ring type vacuum pump Solid-Liquid Separation System Separation efficiency ≥90% Cyclonic separator Maximum Suction Depth ≥7 meters Verified test value Emission Standard National VI Compliant After-sales Service Nationwide chassis warranty; lifetime upfit support Chengli commitment Key Drafting Points: • Clearly specify chassis requirements: Stipulating 'Dongfeng 3308 mm wheelba