Case Study and Winning Bid Solution Analysis for the New Dongfeng Wastewater Treatment Vehicle in Xuzhou Government Procurement — In Q3 2025, a district Urban Management Bureau in Xuzhou planned to procure a batch of new wastewater treatment vehicles to address urban black-and-odorous water body remediation and emergency sewage discharge needs. The project budget was capped at approximately RMB 3.096 million, targeting 8–12 m³ drainage-type specialized wastewater treatment vehicles. Requirements included China VI-compliant chassis with high maneuverability, ease of maintenance, and suitability for narrow urban roads and older residential communities in Xuzhou. Through open tendering, Chengli Special Purpose Vehicle Co., Ltd. delivered 10 units of the new Dongfeng-chassis wastewater treatment vehicles at a quoted price of approximately RMB 268,000 per unit (based on publicly available tender information). This article provides an in-depth analysis of the case from perspectives including chassis selection, load capacity and maneuverability, maintenance convenience, and Chengli’s flagship models. I. Chassis Selection: Comparative Analysis of Dongfeng, Sinotruk, Foton, FAW, and Shaanxi Automobile Chassis In this Xuzhou procurement project, chassis selection was the core decision factor. Chengli Special Purpose Vehicle offered chassis solutions covering Dongfeng, Sinotruk, Foton, FAW, and Shaanxi Automobile. Based on the actual winning bid results, the Dongfeng chassis was selected as the preferred option due to its large local market share and dense network of after-sales service centers. Chassis Brand | Wheelbase (mm) | Engine Power (kW) | Max. Permissible Gross Vehicle Mass (kg) | Suitable Application Scenarios | Maintenance Convenience Dongfeng | 3,308 | 96 | 7,360 | Urban areas, narrow roads, residential communities | Nationwide warranty; numerous service stations Sinotruk | 3,280 | 110 | 8,200 | Heavy-duty applications, suburban areas, construction sites | Fewer service stations; cross-regional support required Foton | 3,360 | 100 | 7,490 | Urban-rural fringe zones, logistics operations | Moderate service coverage FAW | 3,300 | 105 | 8,000 | Long-haul transport, high-load operations | Limited local presence Data Source: Chengli Special Purpose Vehicle product database and MIIT official announcement parameters (e.g., model CLW5070GSSD6). The Dongfeng chassis boasts the highest regional penetration rate in Xuzhou, with spare parts shipped within 24 hours—significantly reducing operational and maintenance costs. II. Load Capacity and Maneuverability: Advantages of the Dongfeng Chassis Wastewater treatment vehicles must accommodate water tanks, sewage pumps, filtration systems, etc., resulting in a typical curb weight of 5–7 tons. The Dongfeng chassis (e.g., model CLW5070GSSD6) features a maximum permissible gross vehicle mass of 7,360 kg, offering ample payload margin. Its wheelbase of 3,308 mm and small turning radius enable smooth navigation through Xuzhou’s historic urban alleys—some as narrow as 3.5 meters wide. While Sinotruk chassis offer higher load capacity, their longer wheelbase hinders turning and U-turns in older residential neighborhoods. Feedback from the Xuzhou procurement authority stated: “The Dongfeng-chassis vehicles supplied by Chengli performed flawlessly during operations in a downtown village in Yunlong District, fully meeting maneuverability requirements without scraping or jamming.” III. Maintenance Convenience: Nationwide Warranty for Dongfeng Chassis + Lifetime After-Sales Support for Chengli Superstructure Chassis maintenance is a critical long-term consideration in government procurement. Dongfeng chassis benefit from a nationwide warranty system, with three authorized service centers located locally in Xuzhou—enabling routine maintenance to be completed within one day. Chengli Special Purpose Vehicle offers lifetime after-sales support for its superstructures, with spare parts dispatched within