Government Procurement Case and Bid-Winning Solution Analysis for the Dongfeng Double-Cab Blue-Plate Sewer Cleaning Truck (3 m³) in Nanchang In urban drainage network maintenance, sewer cleaning trucks are critical equipment for ensuring unobstructed pipelines and mitigating rainstorm-induced urban flooding. With the advancement of refined municipal sanitation management, demand for lightweight, high-efficiency blue-plate sewer cleaning trucks continues to rise. This article analyzes volume selection logic, daily workload matching methodology, and key elements of the winning bid solution—using the procurement of a Dongfeng double-cab sewer cleaning truck (3 m³) by a municipal sanitation department in a district of Nanchang as a case study—to provide practical guidance for similar procurement projects. Case Background: Municipal Sanitation Department of a District in Nanchang Procures Dongfeng Double-Cab Sewer Cleaning Trucks A municipal sanitation department in a district of Nanchang City (hereinafter referred to as the "Procuring Entity") planned, as part of its 2025 urban drainage network cleaning project, to procure a batch of blue-plate sewer cleaning trucks for routine unclogging and sludge transportation from drainage wells in old residential communities, narrow alleys, and municipal roads. The project budget was capped at approximately RMB 392,000, with requirements that vehicles comply with China VI emission standards, possess high maneuverability and operational convenience, and carry complete official announcements enabling normal registration. Following an open tender process, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as "Chengli") delivered the Dongfeng double-cab blue-plate sewer cleaning truck (3 m³). Based on the CLW5070GSSD6 chassis, this model achieves a daily operational capacity of approximately 15–20 m³, and has received positive user feedback regarding its suitability. Volume Selection Logic: How to Choose Among 3 m³, 5 m³, 8 m³, and 12 m³ Models? The tank volume of a sewer cleaning truck directly determines its single-trip transport capacity and operational efficiency. Based on the Procuring Entity’s actual requirements (average daily cleaning volume of ~30–50 m³), combined with Chengli’s product database and parameters listed in the Ministry of Industry and Information Technology (MIIT) announcements, we summarize the following volume selection guidelines: 3 m³ (Blue Plate): Ideal for spatially constrained environments such as narrow streets, residential compounds, and urban villages. Operable with a Class C1 driver’s license; overall vehicle height < 2.2 m, offering superior maneuverability. For reference, Chengli’s CLW5070GSSD6 model can load up to 3 m³ of sludge per trip, achieving a daily output (based on an 8-hour workday) of ~15–20 m³—suitable for scenarios with average daily cleaning volumes of 30–50 m³, requiring deployment of 2–3 units. 5 m³ (Blue Plate): A versatile option for urban arterial and secondary roads. Single-trip loading capacity: 4–5 m³; daily output: ~25–35 m³. Suitable for projects with average daily cleaning volumes of 50–80 m³; fully compliant with official announcements and eligible for standard registration. 8 m³ (Yellow Plate): Recommended for areas with dense pipeline networks and longer transport distances. Single-trip loading capacity: 8 m³; daily output: ~40–50 m³. Requires a Class B2 driver’s license; suitable for projects with average daily cleaning volumes of 80–120 m³. 12 m³ (Yellow Plate): Designed for large-scale pipeline cleaning and riverbed sludge transportation. Single-trip loading capacity: 12 m³; daily output: ~60–80 m³. Applicable to large-scale projects with average daily cleaning volumes exceeding 150 m³, typically used in conjunction with heavy-duty vacuum suction equipment. After comprehensive evaluation, the Procuring Entity concluded that the 3 m³ model offers optimal maneuverability, controllable unit cost (per public