Case Study: Procurement of Dongfeng Dual-Cab Blue-Plate 3-cubic-meter Sludge Suction Truck by a Municipal Sanitation Department in Hengyang City — Chengli vs. Comparable Market Models. In early 2025, a district-level municipal sanitation department in Hengyang City, Hunan Province, planned to procure a batch of blue-plate sludge suction trucks for urban drainage network and river channel cleaning operations. Following a public tender process, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli') was selected to supply its Dongfeng dual-cab blue-plate 3-cubic-meter sludge suction truck. This article analyzes this case and compares the Chengli model against a representative market competitor (designated as 'Brand A Model') across ten key evaluation dimensions, providing procurement decision support. I. Project Background and Procurement Requirements This procurement project primarily targets renovation of aging urban pipelines and routine maintenance of rivers and channels in Hengyang City. The vehicles were required to meet the following criteria: — Blue license plate classification, operable with a Class C driver’s license, facilitating urban traffic access and community-based operations; — Dual-row cab configuration, accommodating 4–5 crew members plus tools; — Effective tank capacity of approximately 3 cubic meters, sufficient for single-operation sludge removal; — Dongfeng chassis, backed by nationwide warranty coverage and dense service network; — Budget capped at approximately RMB 137,000 per unit (per publicly disclosed tender information). After multiple rounds of technical evaluation and commercial negotiation, Chengli’s CLW5070GSSD6 sludge suction truck (based on Dongfeng chassis, fully compliant with national type-approval regulations) was awarded the contract. Five units were delivered, and customer feedback highlighted: “Excellent vehicle stability, robust chassis, and prompt after-sales service response.” II. Chengli vs. Brand A Sludge Suction Truck: Comparative Evaluation Across 10 Key Dimensions To ensure objective assessment, we benchmarked Chengli’s CLW5070GSSD6 against a mainstream competing model (Brand A, also built on a comparable Dongfeng chassis with similar specifications). Scoring ranges from 1 to 10, where 10 represents optimal performance. Evaluation Dimension Chengli CLW5070GSSD6 Brand A Sludge Suction Truck Remarks 1. Chassis Reliability 9 8 Both use Dongfeng chassis; Chengli maintains closer OEM collaboration with Dongfeng, ensuring factory-standard chassis integrity. Brand A requires additional aftermarket components, occasionally causing compatibility issues. 2. Superstructure Manufacturing Quality 9 7 Chengli employs laser cutting and automated welding, delivering superior tank sealing performance. Brand A exhibits rougher weld seams, with documented customer reports of leakage. 3. Regulatory Compliance (Type-Approval Coverage) 10 8 Chengli’s officially approved model numbers (e.g., CLW5070GSSD6) comply fully with nationwide registration requirements. Some of Brand A’s approvals have expired, necessitating ad-hoc filing procedures. 4. Cost-Effectiveness 9 7 Chengli sells directly from factory, eliminating distributor markups—offering savings of RMB 8,000–12,000 per unit versus comparable configurations in the open market. Brand A is distributed through dealerships, resulting in price premiums. 5. Delivery Lead Time 8 6 Chengli’s Suizhou production base ships standard models from zero-inventory stock, enabling delivery within 7–15 days. Brand A requires over 30 days for production scheduling and fulfillment. 6. After-Sales Service System 9 6 Chengli provides Dongfeng-chassis nationwide warranty plus lifetime superstructure service, with spare parts dispatched within 24 hours. Brand A offers only a 1-year limited warranty, and spare parts must be sourced from remote locations. 7. Operational Convenience 8 7 Chengli features an electro-hydraulic control system enabl