Government Procurement Case and Bid-Winning Solution Analysis for the Huizhou Dongfeng D6 Blue License Plate, 3-Cubic-Meter Sludge Tipper Truck In municipal sanitation, sludge transport trucks are critical equipment ensuring the normal operation of urban drainage systems and wastewater treatment plants. In early 2026, a municipal sanitation department in Huizhou, Guangdong Province, initiated a small-batch procurement to meet sludge transfer requirements from local wastewater treatment plants. Unlike conventional tendering processes, they adopted a pragmatic 'trial-use-one-unit-first-then-decide-on-bulk-purchase' approach, ultimately selecting the Dongfeng D6 blue license plate, 3-cubic-meter sludge tipper truck. This article dissects the complete case—from trial use and comparative evaluation to bulk delivery—based on the actual procurement process. I. Procurement Background and Requirements Analysis The department oversees a wastewater treatment plant generating approximately 15 tons of sludge per day (with 80% moisture content), requiring transportation to a disposal center located 30 km away. Its existing fleet is aging, and vehicles comply only with China IV emission standards, rendering them subject to phase-out. The newly procured vehicle must satisfy the following mandatory criteria: 1. Blue license plate, operable with a Class C driver’s license: lowers driver qualification thresholds and facilitates temporary staffing. 2. Cargo body capacity of ~3 cubic meters: aligns single-trip hauling volume with daily processing output, minimizing round trips. 3. Fully enclosed, drip-proof design: complies with environmental regulations and prevents secondary pollution during transit. 4. Budget capped at approximately RMB 146,000: consistent with local procurement benchmarks for similar vehicles. After preliminary screening, the Dongfeng D6 chassis was prioritized due to its high regional market penetration and dense network of service centers across South China. Chengli Special Purpose Vehicle Co., Ltd.’s Dongfeng D6 blue license plate, 3-cubic-meter sludge tipper truck (reference announcement model: CLW5040ZWXD6; exact configuration subject to final specification) entered the shortlist. II. Trial-Use Performance Report: A 'Health Checkup' for One Unit In December 2025, the department procured one unit of Chengli’s Dongfeng D6 blue license plate, 3-cubic-meter sludge tipper truck for a 30-day trial period. Key performance observations during this period included: • Loading Efficiency: The 3-cubic-meter cargo body accommodated ~3.2 tons of sludge (80% moisture content), enabling a single trip to cover half the plant’s daily output; completing the full daily task required only 4–5 round trips. • Sealing Performance: During one week of continuous rainy-season operations, no leakage occurred at the rear door or roof sealing strips, and no wastewater overflowed from the cargo compartment. • Fuel Consumption: Average fuel consumption was ~8.5 L/100 km when empty and ~11 L/100 km when fully loaded—approximately 0.5–1 L/100 km lower than comparable competing models. • Maneuverability & Passability: With its compact blue license plate dimensions (length: 5.99 m; width: 2.0 m), the vehicle navigated narrow plant access routes with ease, and drivers holding Class C licenses operated it effortlessly. • Fault Record: No mechanical or hydraulic system failures occurred over the 30-day period; only routine pre-departure inspections were required. The trial report confirmed stable performance of both the powertrain (equipped with Quanchai Q23-95E60 engine, meeting China VI emission standards) and the hydraulic lifting system (dual-cylinder lift mechanism enabling rear-tilt self-unloading), fully satisfying daily operational demands. III. Market Comparison: Key Differentiators Between the Dongfeng D6 Blue License Plate, 3-Cubic-Meter Sludge Tipper and Competing Models During the trial period, the procurement team concurrently benchmarked t