Case Study and Bid Winning Solution Analysis for the Blue-Plate 5-cubic-meter Dongfeng Single-Cab Sewer Cleaning Truck in Changde Municipal Government Procurement. Case Source: A municipal sanitation department in Changde City (hereinafter referred to as the 'Procuring Entity') launched a procurement project for sewer cleaning vehicles for urban drainage networks and river channels in Q4 2025. The project included multiple categories of sanitation vehicles, with the blue-plate 5-cubic-meter sewer cleaning truck as the core requirement. This article is based on publicly released tender information and actual delivery records from Chengli Special Purpose Vehicle Co., Ltd. I. Project Background and Core Requirements The Procuring Entity urgently needed to supplement a batch of efficient and compliant sewer cleaning vehicles due to severe siltation in aging urban pipelines and high maintenance costs associated with outdated equipment. Following preliminary research, the entity specified the following key requirements: Vehicle Compliance: Blue license plate; drivable with a Class C driver’s license; overall vehicle length ≤6 meters; gross vehicle weight ≤4.5 tons—ensuring maneuverability in narrow alleys and old residential communities. Operational Capability: Effective tank capacity ≈5 m³; equipped with a high-pressure cleaning system (rated pressure ≥20 MPa) and suction/sewer cleaning functionality; single-operation coverage area ≥200 m². Multi-Vehicle Coordination: In addition to the sewer cleaning truck, supporting water-sprinkling trucks and vacuum sewage trucks were required to establish an integrated 'flushing–cleaning–transportation' workflow, reducing management complexity across multiple suppliers. Budget Control: Total budget for the complete vehicle and body-upfitting was capped at approximately RMB 562,000 (based on reference data from similar tender projects), demanding outstanding cost-effectiveness and comprehensive after-sales service. After evaluating multiple suppliers, the Procuring Entity selected Chengli Special Purpose Vehicle Co., Ltd.’s 'Dongfeng Single-Cab Sewer Cleaning Truck (Blue License Plate, 5-cubic-meter Capacity)' solution and simultaneously procured a 3-cubic-meter vacuum sewage truck and an 8-cubic-meter water-sprinkling truck, achieving turnkey delivery. II. Solution Analysis: Why Choose Chengli’s Multi-Category Integrated Package? This procurement was not limited to a single vehicle model but involved a bundled package comprising sewer cleaning trucks, vacuum sewage trucks, and water-sprinkling trucks. Leveraging its full-range production capability—covering 44 vehicle categories including water-sprinkling trucks, garbage trucks, and vacuum sewage trucks—and extensive experience in government procurement (having served over 500 municipal sanitation entities), Chengli demonstrated three key advantages in its proposal: 1. Common Chassis Across Multiple Models Reduces Spare Parts and Maintenance Costs Chengli’s sewer cleaning truck (CLW5070GSSD6 series) and the concurrently procured 3-cubic-meter vacuum sewage truck both utilize the Dongfeng light-duty chassis, sharing identical core components—including engine, transmission, front and rear axles. This enables the Procuring Entity to stock only one set of commonly used chassis spare parts to support both vehicles, significantly reducing inventory burden. Under Chengli’s after-sales policy, the Dongfeng chassis qualifies for nationwide warranty coverage, while the superstructure enjoys lifetime service support and 24-hour direct spare parts dispatch—further lowering long-term operational costs. 2. Comprehensive Vehicle Type Approval Enables Nationwide Registration and Annual Inspection As a special-purpose vehicle, regulatory compliance—particularly official type approval—is critical for registration. Chengli holds complete type-approval documentation for 108 models, including the CLW5070GSSD6, with emissions meeting China VI standards—ensuring sea