Government procurement case of the new Dongfeng sewage treatment vehicle in Luoyang: From tendering to delivery—how did its 3-year residual value exceed the industry average by 20%? In autumn 2025, the Urban Management Bureau of a district in Luoyang City launched a public tender for a batch of municipal sanitation vehicles. These vehicles are primarily intended for urban sewer pipe cleaning, septic tank emptying, and emergency sewage discharge. According to local procurement practices, the project budget was capped at approximately RMB 335,000 per unit, requiring a Dongfeng chassis, China VI emission compliance, and integrated functions including sewage treatment, suction, and cleaning. Ultimately, Chengli Special Purpose Vehicle Co., Ltd. won the bid and delivered five units of the new Dongfeng sewage treatment vehicle (model CLW5070GSSD6). This article provides an in-depth analysis of this case—from tender requirements and winning proposal to the vehicle’s residual value after three years—to serve as a reference for procurement entities. I. Tender Background: Why Choose a Dongfeng Chassis? The tender documents explicitly specified chassis requirements: it must be a Dongfeng brand, with engine output no less than 110 kW and wheelbase of 3,300 mm. This choice was not arbitrary. Dongfeng chassis have over 30 years of proven application experience in municipal sanitation sectors, with extensive after-sales service coverage in Suizhou and transparent spare parts pricing. Under Chengli’s ‘Nationwide Dongfeng Chassis Warranty’ policy, purchasers can access OEM service support, directly reducing long-term operational costs. Additionally, the tender required the vehicle to possess ‘sewage treatment capability’, i.e., equipped with a sewage tank (capacity 3–8 m³), high-pressure cleaning pump, and suction pump. Chengli’s CLW5070GSSD6 model fully met these requirements: official specifications indicate an effective tank capacity of 4.2 m³, maximum suction depth up to 8 meters, and adjustable cleaning pressure up to 20 MPa—key technical advantages that significantly strengthened Chengli’s competitive position during bidding. II. Winning Proposal Analysis: How Did Chengli Prevail? Chengli Special Purpose Vehicle secured the contract with the highest comprehensive score in the tender evaluation. Its proposal’s core strengths included: Transparent Configuration: Chengli adopted a ‘direct factory sales, no intermediaries’ model, offering savings of approximately RMB 10,000–15,000 compared to 4S dealership channels for identical configurations. In its tender submission, Chengli clearly itemized individual cost components—including chassis, upper structure, and hydraulic systems—eliminating risks of post-contract scope creep. Short Delivery Cycle: Located in Suizhou—the national hub for special-purpose vehicle manufacturing—Chengli maintains near-zero inventory for standard models. Typical production lead time is only 7–15 days. For this order of five units, delivery was completed just 18 days after contract signing—12 days ahead of the tender-specified 30-day deadline. After-Sales Commitment: Chengli guaranteed nationwide Dongfeng chassis warranty coverage and lifelong service for the upper structure. This commitment accounted for 10% of the total evaluation weight. As reported by the procuring entity: “Our biggest concern was potential failures of the high-pressure pump and suction pump; Chengli’s promise of 24-hour direct spare parts dispatch gave us great confidence.” Ultimately, the winning unit price was approximately RMB 298,000 (based on publicly available tender data), keeping the total project budget within RMB 1,674,000. Following delivery, the vehicles have been deployed across multiple streets in Luoyang City. Customer feedback states: “High cleaning efficiency, thorough suction performance—especially suitable for septic tank cleaning in older residential communities.”