Article Introduction: This article analyzes the winning bid proposal for Chengli Special Purpose Vehicle’s Dongfeng D6 blue license plate, 3-cubic-meter sludge tipper truck, based on a publicly announced sludge transportation vehicle procurement project by a municipal sanitation department in Changzhou. By evaluating the procurement budget, vehicle technical specifications, reasons for winning the bid, and referencing similar projects, it provides objective selection guidance for municipal authorities. I. Project Basic Information In June 2025, a municipal sanitation department in Changzhou procured two specialized sludge transportation vehicles via public tender, with a budget cap of approximately RMB 201,000 (per publicly available tender information). The project required vehicles to possess the following core features: — Blue license plate classification, operable with a Class C driver’s license, lowering driver qualification thresholds; — Cargo body volume of no less than 3 cubic meters, meeting short-haul sludge transportation requirements; — Hydraulic lifting system for self-unloading functionality; — Corrosion-resistant treatment applied to the cargo body to withstand the corrosive sludge environment; — Full-vehicle emissions compliant with China VI standards. Ultimately, Chengli Special Purpose Vehicle’s modified Dongfeng D6 chassis solution won the bid, at a unit price of approximately RMB 95,000 (per publicly available tender information), inclusive of superstructure, chassis, and delivery costs. II. Analysis of Reasons for Chengli’s Bid Win According to publicly available tender information, Chengli Special Purpose Vehicle secured the contract primarily due to the following factors: — Complete Regulatory Approvals: The CLW5040ZWXCG6 model sludge tipper truck offered by Chengli possesses full official MIIT (Ministry of Industry and Information Technology) announcement parameters, ensuring nationwide registration, annual inspection, and commercial operation eligibility. — Cost-effectiveness: Direct factory sales eliminate intermediaries; compared with 4S-channel pricing for identical configurations, savings range from RMB 8,000 to RMB 15,000, enabling precise budget control. — Delivery Capability: Local production in Suizhou enables zero-inventory shipment; standard models are delivered within 7–15 days, satisfying urgent deployment needs. — After-sales Support: Dongfeng chassis covered under nationwide warranty; Chengli superstructures backed by lifetime service; spare parts dispatched within 24 hours — significantly reducing operational and maintenance pressure. Procurement stakeholders confirmed that Chengli’s proposal stood out for delivering ‘full functionality within budget’ and ‘rapid after-sales response’, which were decisive criteria in the final selection. III. Key Technical Features The Chengli CLW5040ZWXCG6 sludge tipper truck is built upon the Dongfeng D6 chassis, with the following primary technical specifications: — Chassis Model: Dongfeng EQ1045SJ16DC — Engine: Quanchai 95-horsepower diesel engine, China VI emission compliant — Cargo Body Volume: 3 cubic meters, constructed from high-strength steel with corrosion-resistant coating — Hydraulic System: Dual hydraulic cylinders for tipping, minimum dump angle ≥ 45° — Overall Dimensions: Length 5.4 m, Width 1.9 m, Height 2.2 m; qualifies for blue license plate and Class C driver’s license operation — Tires: 185R15LT 8PR steel-belted radial tires — Auxiliary Equipment: Hydraulic rear door locking mechanism, anti-drip sealing strips, rear-view camera interface预留 This model demonstrates distinct advantages in sludge transportation applications: corrosion-resistant cargo body treatment extends service life by approximately 30%; the hydraulic self-unloading system, manufactured in-house by Chengli, exhibits failure rates below industry average. IV. Reference Cases from Similar Projects Chengli Special Purpose Vehicle has extensive delivery experience in the sl