Changzhou Dongfeng Dual-Cab Sewer Cleaning Truck (Blue License Plate, 3 m³) Government Procurement Case Study: A Comprehensive Review of the Full Process — From Aging Equipment to Efficient Sewer Cleaning. In autumn 2025, a municipal sanitation department in a district of Changzhou City (hereinafter referred to as the 'Procuring Entity') launched a procurement initiative to upgrade its urban drainage pipeline cleaning equipment. The project focused on acquiring one Dongfeng dual-cab, blue license plate sewer cleaning truck with an approximate tank capacity of 3 m³, with a budget capped at approximately RMB 331,000 (based on local publicly available tender information). After multiple rounds of research, technical comparison, and on-site inspections, Chengli Special Purpose Vehicle Co., Ltd. successfully delivered the required model, fully compliant with the tender specifications. This article comprehensively reviews the entire government procurement case—from pain points of aging equipment, through vehicle selection and technical evaluation, solution alignment, delivery feedback, to frequently asked questions. I. Pain Points of Aging Equipment: Why Replacement Was Essential The Procuring Entity’s existing fleet of sewer cleaning vehicles had been in service for over eight years and exhibited the following critical issues: Emission Non-Compliance: The legacy vehicles met only China III/IV emission standards. With tightening urban environmental regulations, they could no longer operate normally in certain core urban zones and faced increasing difficulties passing annual inspections. Insufficient Capacity & Low Efficiency: The older models featured tanks with only ~2 m³ capacity; combined with aging vacuum pumps, actual suction power had declined by over 30%. As a result, clearing just one kilometer of pipeline required multiple trips for waste disposal—significantly increasing labor and fuel consumption. Poor Driver Cabin Comfort: Single-cab configurations offered limited space, failing to accommodate two operators simultaneously. Lack of air conditioning during summer created harsh working conditions, contributing to high driver turnover. Rising Maintenance Costs: Frequent failures of chassis and upper-body components drove annual maintenance costs per unit above RMB 30,000, compounded by long lead times for spare parts. Given these operational challenges, the Procuring Entity applied for dedicated fiscal funding to procure a new sewer cleaning truck meeting China VI emission standards, featuring a dual-cab configuration and ~3 m³ tank capacity—to significantly enhance urban pipeline maintenance efficiency. II. Vehicle Selection & Research: From Operational Needs to Technical Specifications The Procuring Entity issued its requirements via public tender, specifying key criteria: Chassis Brand: Dongfeng series, dual-cab configuration, blue license plate (drivable with Class C1 driver’s license); Effective Tank Capacity: Approximately 3 m³; Emission Standard: China VI; Upper-Body Configuration: Integrated high-pressure jetting and vacuum suction capability, or standalone vacuum suction plus self-dumping functionality; Warranty & After-Sales Support: Nationwide chassis warranty coverage; lifetime after-sales service for upper-body components. During the research phase, the Procuring Entity evaluated multiple suppliers. As a leading special-purpose vehicle manufacturer based in Suizhou, Chengli Special Purpose Vehicle Co., Ltd. proposed a blue license plate sewer cleaning truck built on a Dongfeng chassis—model CLW5070GSSD6 (referencing Chengli’s official product parameters). This model carried complete official certification, ensuring nationwide registration eligibility, compliance with annual inspection requirements, and suitability for commercial operation. III. Why Chengli’s Solution Was Selected: Technical Alignment & Advantages During the technical evaluation, Chengli’s Dongfeng dual-cab, blue lic