Nanchang Dongfeng single-cab sludge suction truck (blue license plate, 5-cubic-meter capacity) procurement case: From pilot testing to batch delivery. From 2023 to 2025, a municipal sanitation department in Nanchang City, Jiangxi Province (hereinafter referred to as the 'client') procured the Dongfeng single-cab sludge suction truck (blue license plate, 5-cubic-meter capacity) for three consecutive years to address sludge removal needs in urban drainage networks, rivers, and low-lying areas. A total of 12 units were delivered, with a cumulative contract value of approximately RMB 1.45 million (based on publicly available tender information). The client initially piloted two units, then scaled up to bulk procurement in subsequent years, ultimately adopting an integrated solution. This article reconstructs the real-world procurement case based on after-sales service records and customer feedback from Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli'). I. Procurement Background and Requirements Analysis The client’s existing sludge removal equipment primarily consisted of medium-duty vacuum trucks. However, due to narrow streets and numerous low-clearance bridges in Nanchang’s old urban districts, large vehicles faced significant access limitations. Therefore, in early 2023, the client launched a pilot procurement program for 'miniaturized and highly maneuverable' sludge removal equipment, specifying the following requirements: • Vehicle classification: Blue license plate, operable with a Class C driver’s license; short wheelbase and small turning radius to enable operation in narrow urban alleys. • Tank capacity: 5 cubic meters (approx. 5 tons), balancing per-trip sludge removal volume with vehicle maneuverability. • Chassis: Dongfeng single-cab configuration, compliant with China VI emission standards, fully certified under the official vehicle announcement system (e.g., model CLW5070GSSD6). • Budget control: Unit price capped at RMB 133,000 (per local procurement practice). After comprehensive evaluation, the client selected Chengli’s Dongfeng single-cab sludge suction truck (blue license plate, 5-cubic-meter capacity). This model features a Dongfeng DOLICA-series chassis, a Q235 carbon steel tank body, high-pressure cleaning system, and vacuum suction pump — all fully compliant with national announcement requirements and eligible for registration and annual inspection in Nanchang. II. Procurement Process and Delivery Milestones The client issued a quotation request via the government procurement platform, and Chengli participated as a direct manufacturer supplier. The process unfolded as follows: • April 2023: Initial procurement of 2 units, totaling approx. RMB 230,000 (RMB 115,000 per unit), deployed for pilot testing of sludge removal efficiency at urban drainage pumping stations. • March 2024: Based on first-year performance feedback (30% daily sludge removal volume increase), an additional 5 units were ordered, totaling approx. RMB 600,000 (RMB 120,000 per unit). • May 2025: With urban pipeline renovation and capacity expansion, another 5 units were procured, totaling approx. RMB 620,000 (RMB 124,000 per unit). Chengli fulfilled orders from its Suizhou production base with zero inventory lead time; standard delivery cycle for this model is 7–15 days. Upon delivery, the client conducted full inspections covering vehicle appearance, chassis certificate of conformity, and upper-body functionality — all verified against national announcement parameters. III. Vehicle Configuration and Value-for-Money Analysis Key specifications of the Dongfeng single-cab sludge suction truck (blue license plate, 5-cubic-meter capacity) are as follows (based on Chengli’s product database and MIIT vehicle announcement data): | Item | Parameter/Configuration | Notes | |------|--------------------------|-------| | Chassis Model | Dongfeng DOLICA (e.g., CLW5070GSSD6 chassis) | China VI compliant; nationwide warran