I. Project Background and Procurement Requirements In Q3 2024, a municipal sanitation department in Nanchong City issued a public tender for Dongfeng single-cab sewer cleaning trucks (blue license plate, 5 m³ tank capacity) to address urban drainage network desilting operations. The project budget was capped at approximately RMB 420,000 (per publicly available tender information), requiring vehicles with dual high-pressure cleaning and vacuum suction capabilities, suitable for narrow streets and densely piped areas. Chengli Special Purpose Vehicle Co., Ltd. delivered three units under a high-cost-performance solution; customer feedback confirmed stable performance during emergency rain-season desilting operations. II. Fuel-Powered vs. Pure Electric Models: Cost Comparison and Operational Context Differences Amid the growing trend toward new-energy vehicles, pure electric sewer cleaning trucks are gradually entering the market; however, fuel-powered models retain distinct advantages in specific operational contexts. Below is a comparative analysis of two 5 m³ sewer cleaning truck variants—fuel-powered (Dongfeng single-cab) and pure electric—based on the Nanchong project (referencing Chengli’s CLW5070GSSD6 model and comparable electric models). Comparison Item Fuel-Powered (Dongfeng Single-Cab, 5 m³) Pure Electric (5 m³) Reference Unit Price (incl. tax, landed cost) Approx. RMB 115,000–135,000 (per Chengli quotations and local procurement practice) Approx. RMB 220,000–280,000 (estimated based on comparable electric models in the market) Operating Cost per Kilometer (fuel/electricity) Approx. RMB 0.8–1.2/km (diesel) Approx. RMB 0.3–0.5/km (electricity) Range / Operational Radius Full-tank range approx. 500 km; supports continuous operation for 8–12 hours Full-charge range approx. 150–200 km; requires mid-shift recharging Refueling/Recharging Time 5 minutes (refueling) 1–1.5 hours (fast charging; requires dedicated charging station) Applicable Scenarios Urban areas with dense pipe networks, remote suburban zones, roads lacking charging infrastructure Urban core districts, fixed-operation zones equipped with charging stations Annual Maintenance Cost Approx. RMB 8,000–10,000 (including engine oil, filters, etc.) Approx. RMB 3,000–5,000 (battery maintenance costs are relatively higher) Environmental Policy Compliance Meets China VI emission standards; eligible for registration and annual inspection Zero emissions; qualifies for preferential road access rights and government subsidies As shown above, the fuel-powered variant holds clear advantages in initial procurement cost, operational range, and refueling convenience—making it especially suitable for cities like Nanchong, characterized by frequent rainfall, complex underground piping networks, and incomplete charging infrastructure coverage. Although the pure electric model offers lower operating costs, its deployment remains constrained by charging infrastructure limitations, rendering it better suited for zones where charging facilities are fully established. For the Nanchong project, the fuel-powered option was selected primarily due to budgetary constraints and operational flexibility requirements. III. Operational Context Differences: Why the Fuel-Powered Model Is More Suitable Nanchong lies within a basin-hilly terrain, where urban drainage networks are predominantly located along aging streets and narrow alleys. The fuel-powered Dongfeng single-cab sewer cleaning truck (wheelbase approx. 3,300 mm) enables highly maneuverable navigation through such confined spaces—and eliminates concerns over charging station availability. Customer feedback indicated that during summer 2024 heavy-rain desilting operations, the vehicle sustained 8-hour continuous operation with only one mid-shift refueling stop, significantly outperforming electric alternatives hampered by mandatory battery-swapping or recharging cycles. Additionally, as a blue-license-plate vehicle operable with a Class