Case Study and Bid-Winning Solution Analysis of the Dongfeng Folding-Wing Wastewater Treatment Vehicle Procurement by Wuhu Municipal Government Against the backdrop of intensifying environmental governance pressures, urban wastewater treatment has become one of the core responsibilities of municipal sanitation departments. Between 2024 and 2025, a district-level municipal sanitation department in Wuhu faced persistent challenges—including aging pipeline blockages and inadequate mobility of small-scale wastewater treatment stations—and consequently conducted multiple public tenders for Dongfeng folding-wing wastewater treatment vehicles. Chengli Special Purpose Vehicle Co., Ltd. secured the contract by leveraging its mature official announcement parameters and localized service capabilities, ultimately delivering eight units with a total contract value of approximately RMB 2.4 million. Based on authentic procurement records, this article analyzes the budget control strategy, vehicle selection rationale, and reasons for sustained collaboration—offering practical insights for industry peers. I. Project Background and Procurement Requirements According to publicly available tender information, the municipal sanitation department issued its first procurement notice in April 2024, seeking four wastewater treatment vehicles, with a unit price cap of RMB 337,000. The vehicles were required to perform sewage suction, solid-liquid separation, chemical dosing, and preliminary purification—and must operate effectively in narrow urban streets. These requirements directly pointed to the Dongfeng folding-wing chassis. Its compact dimensions (overall length ≤ 6.5 meters) and excellent maneuverability made it the preferred choice. In early 2025, due to jurisdictional expansion, the department placed an additional order for four units, with a total budget cap of RMB 2.694 million (approx. RMB 300,000 per unit). Chengli’s proposed solution was based on the CLW5180GSSD6 model (matching the official announcement database for the chassis), customized specifically for wastewater treatment applications: equipped with a high-capacity vacuum pump, a stainless-steel wastewater tank (capacity ≈ 6 m³), and an automated chemical dosing system. This proposal scored highly in technical evaluations, with key advantages including: • Nation-wide warranty coverage for the Dongfeng chassis, reducing long-term maintenance costs; • Corrosion-resistant upper-body materials suitable for acidic/alkaline wastewater environments; • Complete official announcement documentation, enabling seamless registration and annual inspection; • A committed delivery cycle of 12–18 days—meeting urgent procurement timelines. II. Delivery Process and Vehicle Performance The first batch of four units was delivered in June 2024. Chengli dispatched a technical team for on-site commissioning and operator training. According to client feedback, during the initial three months of operation, each vehicle processed approximately 80–100 m³ of wastewater daily, achieving >95% solid-liquid separation efficiency—significantly outperforming previously deployed outdated equipment. Prior to delivery of the second batch in 2025, optimizations were implemented based on operational experience—including repositioning of the tank discharge outlet and upgrading the control panel to enable one-touch discharge functionality. Cumulatively, both batches have operated for over 2,000 hours without any major failures. Notably, Chengli’s after-sales team maintained continuous post-delivery engagement—providing free quarterly inspections and 24-hour direct-shipping spare parts service. The client’s project manager remarked: “From tender submission to final delivery, Chengli provided comprehensive documentation support—including official announcement parameter sheets, after-sales commitment letters, and training records—a level of transparency rarely seen among other suppliers.” III. Comparative Data Analys