Jingzhou National VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle: In-depth Analysis of Government Procurement Case and Winning Bid Solution. In 2024, a municipal sanitation department in Jingzhou procured a batch of National VI Dongfeng 3308 mm wheelbase sewage treatment vehicles for its urban pipeline renovation and sewage treatment project, delivering a total of six units at an aggregate value of approximately RMB 1.2 million (based on publicly available tender information). These vehicles are now operational across Jingzhou’s main urban area, development zone, and selected townships, with customer feedback highlighting 'stable operation, high availability, and low failure rate'. This article uses this case as a starting point to systematically analyze the procurement background, vehicle configuration, pricing structure, and bid-winning rationale of the National VI Dongfeng 3308 mm wheelbase sewage treatment vehicle, providing reference for users currently selecting models or preparing tenders. I. Customer Requirements and Vehicle Selection Background At the end of 2023, the municipal sanitation department launched a sewer network desilting and wastewater treatment capacity enhancement project. Its aging fleet no longer complied with the National VI emission standard, and maintenance costs had risen annually. Following internal evaluation, the following core requirements were established: • National VI Emission Standard: Compliant with the latest environmental policies, enabling nationwide registration and annual inspection. • 3308 mm Wheelbase Chassis: Ensures maneuverability in narrow urban alleys while accommodating sufficient space for the sewage treatment tank installation. • Integrated Sewage Treatment System: Capable of combined functions including vacuum suction, solid-liquid separation, wastewater purification, and sludge drying. • Budget Control: Unit budget capped at approximately RMB 224,000; total budget not exceeding RMB 1,343,000. After multiple rounds of comparison and on-site inspections, the department selected Chengli Special Purpose Vehicle Co., Ltd.’s CLW5070GSSD6-type sewage treatment vehicle (model number per official announcement), built on the Dongfeng 3308 mm wheelbase chassis, powered by a Yuchai 140-horsepower engine, and equipped with an integrated 'vacuum suction + solid-liquid separation + wastewater purification' upper assembly system. II. Winning Bid Solution and Vehicle Configuration This procurement was conducted via open tender, with five enterprises participating. Chengli secured first place in the comprehensive scoring evaluation—cited for its complete official model certification, transparent configuration, competitive pricing, and robust after-sales service. Key configuration parameters are listed below: Comparison of Configuration Parameters for the Winning National VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle Configuration Item Chengli Winning Solution Common Market Solutions Chassis Brand / Wheelbase Dongfeng / 3308 mm Dongfeng / 3308 mm Emission Standard National VI National VI Engine Yuchai 140 HP Yunnei 130 HP Tank Capacity 4.5 m³ 4.0 m³ Sewage Treatment System Vacuum Suction + Solid-Liquid Separation + Purification Vacuum Suction + Solid-Liquid Separation Only Purification Efficiency ≥90% ≥70% Warranty Period 3-year nationwide chassis warranty + lifetime upper-assembly service 1-year full-vehicle warranty Unit Price (per tender information) Approx. RMB 198,000/unit Approx. RMB 215,000/unit As shown above, the Chengli solution demonstrates clear advantages over competitors in engine power output, tank capacity, functionality of the sewage treatment system, purification efficiency, warranty coverage, and unit price. Notably, the 'purification efficiency ≥90%' specification directly meets local environmental authorities’ discharge water quality requirements. III. Batch Delivery and Ongoing Collaboration The first batch of four units was delivered in March 202