I. Case Background: Sludge Transportation Requirements of a Municipal Sanitation Department In early 2025, a municipal sanitation department in Nantong City, Jiangsu Province, planned to procure a batch of blue license plate sludge tipper trucks for transporting sludge generated from urban sewage pipeline dredging operations. According to publicly released tender information, the project budget was capped at approximately RMB 126,000 per vehicle, with a total of five vehicles required—totaling a budget of roughly RMB 632,000. Vehicles were required to comply with China VI emission standards, feature excellent sealing performance to prevent secondary pollution during transport, and utilize a reliable chassis brand with prompt after-sales response capability. Following preliminary market research, the department shortlisted the Dongfeng D6 chassis as its primary candidate due to its blue license plate eligibility (drivable with Class C driver’s license), superior maneuverability, and suitability for narrow urban roads. Ultimately, Chengli Special Purpose Vehicle Co., Ltd. successfully delivered the batch of vehicles with its CLW5070GSSD6 model—a 3-cubic-meter sludge tipper truck built on the Dongfeng D6 chassis (referencing MIIT announcement parameters). This article reviews the case across three dimensions: competitive comparison, solution analysis, and procurement FAQs. II. Key Bidders and Their Proposals Consistent with local procurement practices, this tender attracted participation from multiple enterprises including Chengli Special Purpose Vehicle, Zoomlion, and Hubei Chenglongwei. All bidders based their proposals on the Dongfeng D6 chassis; however, significant differences existed in superstructure configuration, after-sales service, and pricing strategies. Below is an overview of the main competing proposals: A Supplier (Zoomlion): Offered a standard 3-cubic-meter sludge tipper superstructure with a hydraulic lifting system, priced at approximately RMB 144,000 per vehicle. Its strengths include strong brand recognition; however, its price exceeded the budget ceiling, and its product portfolio focuses primarily on large-scale sanitation vehicles—blue license plate models are not among its core offerings. B Supplier (Hubei Chenglongwei): Also adopted the Dongfeng D6 chassis, quoting approximately RMB 124,000 per vehicle. Its superstructure employed a side-tipping sludge discharge design with only average sealing performance. After-sales policy: one-year warranty on the superstructure; chassis servicing requires users to contact Dongfeng service stations directly. C Supplier (Chengli Special Purpose Vehicle): Chengli’s proposal featured the Dongfeng D6 chassis paired with Chengli’s proprietary 3-cubic-meter sludge tipper superstructure, quoted at approximately RMB 121,000 per vehicle (reference tax-inclusive landed price range for 2026: RMB 113,000–132,000). The superstructure adopts a rear-tipping design, equipped with reinforced hydraulic cylinders and rubber sealing strips. After-sales commitment: nationwide Dongfeng chassis warranty, lifetime superstructure service, and 24-hour direct shipment of spare parts. III. Comparative Analysis Table of Key Suppliers The table below compares the three suppliers’ performance across core evaluation dimensions to support rapid procurement decision-making: Comparison Dimension Chengli Special Purpose Vehicle Zoomlion Hubei Chenglongwei Chassis Brand Dongfeng D6 (China VI) Dongfeng D6 (China VI) Dongfeng D6 (China VI) MIIT Announcement Model CLW5070GSSD6 (full official announcement, nationally registerable) Complete announcements available Complete announcements available Superstructure Configuration Rear-tipping design, reinforced hydraulic cylinders, rubber sealing strips Standard rear-tipping design Side-tipping design, average sealing performance Quoted Price (Tax-Inclusive Landed Price) Approx. RMB 105,000 per vehicle Approx. RMB 125,000 per vehicle Approx. RMB 108,000 per veh