Shenzhen Government Procurement Case of Dongfeng Single-Cab Sludge Suction Truck (Blue License Plate, 5 m³): Analysis of Efficiency Improvement and Cost Control — Under Shenzhen’s humid, rainy climate, municipal drainage network sludge removal operations face high-frequency, high-load challenges. A municipal sanitation department recently procured a batch of Dongfeng single-cab blue license plate 5 m³ sludge suction trucks for routine maintenance and emergency unclogging. This article compares operational efficiency, staffing requirements, and operating costs before and after deployment, based on actual usage data, and analyzes critical performance attributes—including anti-corrosion coating durability and seal component longevity—to provide reference insights for similar procurement decisions. Key Conclusion: Following deployment of these sludge suction trucks, average daily operation volume increased by approximately 40%, crew size per shift was optimized from four to two personnel, and annual operating costs decreased by about 25%. According to local procurement practices, the reference unit price for blue license plate 5 m³ sludge suction trucks—based on publicly announced tender information—ranges between RMB 110,000 and 135,000. I. Project Background and Procurement Requirements Shenzhen is located in South China, with an average annual rainfall of approximately 1,900 mm, concentrated during the rainy season, resulting in frequent blockages of drainage pipelines. Traditional manual sludge removal is inefficient and poses high safety risks; meanwhile, hydraulic equipment tends to corrode rapidly and sealing components age quickly under hot, humid conditions. The municipal sanitation department’s existing sludge suction trucks—procured in 2018—feature outdated chassis and insufficient working radius, necessitating replacement with new vehicles compliant with China VI emission standards, eligible for blue license plates, operable with a Class C driver’s license, and engineered for high-humidity environments. Through open tendering, the department ultimately selected the Dongfeng single-cab blue license plate 5 m³ sludge suction truck manufactured by Chengli Special Purpose Vehicle Co., Ltd. The chassis model is Dongfeng EQ1075SJ3CDF (referencing CLW5070GSSD6 series official announcement parameters), equipped with a Chengli-customized sludge suction system. A total of five units were delivered and deployed exclusively for routine operations along key drainage routes within the jurisdiction. II. Performance Comparison Before and After Deployment The table below presents key performance indicators for a single sludge suction truck, comparing pre-deployment conditions (manual labor + outdated equipment) versus post-deployment (Chengli-Dongfeng 5 m³ sludge suction truck). Data are derived from the department’s actual operational records spanning June 2024 to February 2025. Indicator | Pre-Deployment (Manual Labor + Outdated Equipment) | Post-Deployment (Chengli-Dongfeng 5 m³ Sludge Suction Truck) | Improvement/Optimization Rate ---|---|---|--- Average Daily Sludge Removal Volume (m³) | 12–15 | 18–22 | ↑ ~40% Personnel per Shift (persons/group) | 4 | 2 | ↓ 50% Average Operation Time per Shift (hours) | 3–4 | 1.5–2 | ↓ ~45% Annual Operating Cost per Unit (RMB, including fuel, maintenance, and labor) | ~185,000 | ~138,000 | ↓ ~25% Monthly Average Equipment Downtime Due to Failure (occurrences) | 3–4 | 1–2 | ↓ 50% Anti-Corrosion Coating Maintenance Interval (months) | 6 (requires touch-up coating) | 12 (original factory coating durability) | Extended by 100% Note: All above data are sourced from the department’s actual operational reports. Cost calculations incorporate local labor wages, fuel prices, and equipment depreciation estimates; specific values may vary depending on operational intensity. III. Increased Daily Operation Volume: From ‘Waiting for Rain to Stop’ to ‘Ready to Operate Anytime’ During Shenzhen’s rainy seaso