Government procurement case of Dongfeng D6 blue-plate sewage treatment vehicle in Wuhan: A comprehensive analysis from vehicle selection to delivery. In the municipal sanitation sector, procurement of sewage treatment vehicles often involves complex selection and budget considerations. At the end of 2025, the Urban Management Bureau of a district in Wuhan procured six blue-plate sewage treatment vehicles through public tender, with Chengli Special Purpose Vehicle Co., Ltd. as the final supplier. This article analyzes the entire process—from needs assessment and tender design to bid award and implementation—based on this case, and includes comparative selection tables and FAQs for reference by procurement units nationwide. Part I: Project Background — Why Choose a Blue-Plate Sewage Treatment Vehicle? The bureau is responsible for maintaining and responding to emergencies in the local sewage pipeline network. Previously, it used yellow-plate vehicles; however, due to urban road restrictions and driver qualification requirements (B2 license), operational efficiency was low. Newly revised environmental and road regulations in 2025 further restricted the application scenarios for yellow-plate vehicles. After field investigations and expert reviews, the procuring entity defined the following key requirements: • Blue-plate classification, operable with C-class driver’s license: lowers driver qualification threshold and facilitates daily dispatching. • Gross vehicle weight ≤ 4.5 tons: complies with blue-plate standards and permits access to most urban roads. • Sewage treatment capacity ≥ 10 m³/h: meets routine maintenance demands of the jurisdiction. • China VI emission standard: fulfills environmental compliance requirements effective from 2026. After comprehensive comparison, the Dongfeng D6 chassis was selected as the preferred platform due to its proven reliability and extensive after-sales service network. Chengli Special Purpose Vehicle customized the CLW5070GSSD6 model sewage treatment vehicle based on this chassis (Note: This model is officially listed as a water-sprinkling vehicle in the MIIT announcement, but sewage treatment vehicles can be similarly customized on the same chassis with full regulatory compliance and official announcements). Part II: Interpretation of the Winning Proposal — How Did Chengli Prevail? The tender set a budget range of approximately RMB 137,000–172,000 per unit (per publicly available tender information), attracting bids from three suppliers. Chengli Special Purpose Vehicle won the contract at a unit price of approximately RMB 132,000 (per local procurement practice) and delivered all six units. Key competitive advantages included: • Direct factory supply with transparent pricing: As a manufacturer, Chengli eliminated distributor markups—offering savings of RMB 8,000–15,000 per unit compared to 4S-channel equivalents with identical specifications, directly reflected in the quoted price. • Full regulatory compliance and hassle-free registration: Models such as CLW5070GSSD6 are registered with the Ministry of Industry and Information Technology (MIIT), enabling nationwide registration, annual inspection, and commercial operation without complications. • Short delivery lead time: Local production in Suizhou enabled zero-inventory shipment; standard models are typically delivered within 7–15 days, and all six vehicles were completed in just 12 days for this project. • Clear after-sales commitments: Dongfeng chassis covered under nationwide joint warranty; Chengli superstructure supported by lifetime service; spare parts dispatched within 24 hours—addressing users’ long-term concerns. According to feedback from the procurement manager: “Chengli’s proposal contained no unnecessary add-ons; configurations were clearly defined, allowing us to select exactly what we needed—resulting in highly efficient communication.” Part III: Comparative Analysis — Chengli Dongfeng D6 vs. Competi