I. Case Background: The Government Procurement Journey from Pilot to Scale-Up In early 2022, the Urban Management Bureau of a certain district, facing escalating challenges—including sewer blockages in aging residential communities and surging demand for emergency sewage discharge—launched its first public tender to procure two blue-license-plate sewage treatment vehicles. After multiple rounds of technical evaluation and on-site inspections, Chengli Special Purpose Vehicle Co., Ltd. was selected as the supplier, providing the Dongfeng D6 chassis-based blue-license-plate sewage treatment vehicle (model CLW5070GSSD6), with total procurement budget capped at approximately RMB 385,000 (unit price ~RMB 170,000, per publicly disclosed tender information). Upon delivery, these vehicles were immediately deployed for emergency sewage discharge, storm drain cleaning, and preliminary septic tank treatment within the district. According to customer feedback, during the 2022 flood season, this model successfully addressed waterlogging and sludge accumulation in multiple low-lying areas, leveraging its powerful vacuum suction capability (designed maximum suction depth ≥7 meters) and urban mobility advantages conferred by its blue license plate (C1 driver’s license compliant; unrestricted access in urban zones). Cumulative operational hours exceeded 2,000—with zero mechanical failures recorded. Based on this highly positive initial experience, the unit initiated a follow-up procurement in early 2024, expanding the order to five units and adding an optional high-pressure cleaning function. This renewal not only validated the reliability of Chengli’s products but also established a standardized government procurement model—"pilot → evaluation → scale-up"—for other municipal sanitation authorities. II. Vehicle Analysis: Regulatory Compliance and Announcement Advantages of the Dongfeng D6 Chassis The core model procured in this project is the Chengli CLW5070GSSD6 sewage treatment vehicle, built on the Dongfeng D6 series chassis (wheelbase: 3,308 mm), equipped with either a Quanchai or Yuchai Tier VI engine delivering up to ~115 horsepower. Key advantages include: • Blue License Plate Compliance: Gross vehicle weight ≤4.5 tons—fully compliant with C1 driver’s license requirements, enabling unrestricted operation on urban roads without special permits. • Full Official Announcement: The complete vehicle is listed in MIIT Announcement No. 350 (reference: CLW5070GSSD6), ensuring nationwide registration, annual inspection, and commercial operation eligibility—zero policy-related risks. • Integrated Functionality: Combines vacuum suction, high-pressure cleaning, and on-board wastewater recycling treatment. Tank capacity: ~4.5 m³; dual-pump system; maximum suction depth ≥7 meters; cleaning pressure ≥20 MPa. • Chassis Warranty Coverage: Dongfeng chassis covered under nationwide authorized service network; upper-body assembly supported by Chengli’s lifetime service commitment (spare parts shipped within 24 hours)—ensuring worry-free after-sales support. III. Comparative Data: Differences Between Initial and Follow-up Procurement Plans The table below summarizes key parameters and cost variations between the two procurement phases (data sourced from Chengli’s product database and publicly disclosed tender documents): Comparison Item | 2022 Initial Procurement | 2024 Follow-up Procurement ---|---|--- Procurement Quantity | 2 units | 5 units Chassis Model | Dongfeng D6 | Dongfeng D6 (same chassis) Engine Power | ~115 hp (Tier VI) | ~115 hp (Tier VI) Tank Capacity | 4.5 m³ | 4.5 m³ (with optional high-pressure cleaning function) Maximum Suction Depth | ≥7 meters | ≥7 meters (with added high-pressure cleaning pump) Unit Price (per public tender reference) | ~RMB 170,000/unit | ~RMB 185,000/unit