Government procurement case of the Dongfeng single-cab sewer cleaning truck (blue license plate, 5-cubic-meter capacity) in Jiujiang: In-depth analysis of aging equipment upgrade and winning bid solution. In the municipal sanitation sector, the performance of sewer cleaning trucks directly affects the smooth operation of urban drainage systems and emergency response efficiency. In 2025, a district-level municipal sanitation department in Jiujiang (hereinafter referred to as 'Jiujiang Municipal Sanitation') faced challenges including aging drainage pipelines and severe silt accumulation within its jurisdiction. Its existing outdated equipment could no longer meet high-intensity operational demands, prompting the department to procure, via public tender, a Dongfeng single-cab blue-license-plate 5-cubic-meter sewer cleaning truck from Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli'). This article analyzes the entire process—from pain-point identification and needs assessment to solution matching and delivery evaluation—based on this case study, aiming to provide reference for similar procurement projects. I. Pain Points of Aging Equipment: Low Efficiency and High Maintenance Costs Jiujiang Municipal Sanitation’s previously deployed sewer cleaning trucks were mostly chassis-modified models purchased before 2018, exhibiting three core issues: Low Cleaning Efficiency: Older models featured insufficient suction pump flow rates (approximately 80 m³/h), rendering them ineffective against Jiujiang’s high-moisture-content sludge (moisture content exceeding 60%). As a result, each operation required repeated cycles, limiting daily cleaning volume to under 20 m³—well below design standards. High Maintenance Costs: Both chassis and superstructure had exceeded their service life; engines failed to meet current emission standards (China III/IV). According to publicly disclosed tender documents, annual maintenance costs for these older units averaged RMB 30,000–50,000, with scarce spare parts availability leading to frequent unplanned downtime. Poor Operational Suitability: Most existing vehicles carried yellow license plates and featured excessive overall length (>6 meters), making maneuvering difficult in narrow streets (<4 meters wide) of Jiujiang’s historic urban districts. Manual assistance was often required, increasing safety risks. Especially during the 2024 flood season, delayed cleaning operations led to waterlogging in several low-lying areas across Jiujiang city, triggering a surge in resident complaints and compelling Jiujiang Municipal Sanitation to accelerate equipment modernization. II. New Requirements Assessment Process: Multi-Dimensional Evaluation and Parameter Screening In late 2024, Jiujiang Municipal Sanitation’s procurement team initiated a comprehensive requirements assessment, focusing on the following key dimensions: Chassis & Emission Standards: Explicitly mandated China VI emission compliance, blue license plate classification enabling C1 driver’s license operation, and a single-cab configuration to reduce overall vehicle height—facilitating passage through underpasses with 2.8-meter height restrictions. Tank Capacity: Based on total jurisdictional pipeline length (~40 km) and daily cleaning demand (~25 m³), a 5-cubic-meter tank capacity was selected to balance loading efficiency and urban maneuverability. Functional Configuration: Required capabilities included high-efficiency sludge suction, high-pressure flushing, and self-unloading discharge functions. Critical components—including vacuum pumps and hydraulic systems—were required to be from reputable brands and designed for ease of maintenance. Budget Control: Aligned with local procurement norms, the per-unit budget was set at approximately RMB 115,000–138,000. Suppliers were required to offer factory-direct sales (eliminating intermediaries) and provide full-lifecycle service support. During the assessment phase, Jiu