Government procurement case of the Dongfeng single-cab sewer cleaning truck (blue license plate, 5 m³) in Luoyang: A practical interpretation from trial use to bulk delivery. In daily operations of municipal sanitation departments, sewer cleaning vehicles are critical equipment for ensuring smooth drainage system functionality. Particularly in inland cities like Luoyang, tasks such as rain-season drainage, septic tank cleaning in aging residential communities, and riverbed sediment removal occur frequently—resulting in high demand and intensive usage of sewer cleaning vehicles. However, faced with numerous brands and configurations available on the market, procurement units often struggle with vehicle selection: How can they ensure stable performance, hassle-free registration, and reliable after-sales support—all within a constrained budget? This article details a real-world procurement case involving a municipal sanitation department (hereinafter referred to as 'the Client') purchasing the Dongfeng single-cab sewer cleaning truck (blue license plate, 5 m³), documenting the decision-making process, trial performance, comparative analysis, and final bulk procurement plan under the 'trial-first' model—providing actionable reference for similar procurement scenarios. I. Procurement Background and Requirements Analysis At the end of 2025, the Client planned to procure a batch of blue-license-plate sewer cleaning trucks (gross vehicle weight ≤ 4.5 tons, operable with a Class C1 driver’s license) to address the steadily increasing volume of sewer pipe cleaning tasks within its jurisdiction. Following preliminary research, the Client identified the following core requirements: • Vehicle Type: Blue-license-plate sewer cleaning truck with 5 m³ capacity, built on a Dongfeng single-cab chassis, compliant with China VI emission standards—ensuring ease of urban access and maneuverability in narrow streets. • Budget Control: Based on publicly available tender information, the unit price of comparable blue-license-plate 5 m³ sewer cleaning trucks ranged between RMB 100,000–130,000; the Client set an upper budget limit of approximately RMB 133,000 per unit. • Operational Scenarios: Primarily intended for septic tank emptying in residential communities, storm drain silt removal, and small-scale riverbed sediment transfer—requiring integrated functions including vacuum suction, waste discharge, and high-pressure cleaning. • After-Sales Service: Separate warranty coverage for chassis and superstructure; nationwide chassis warranty coverage required; lifetime service support mandated for the superstructure. During initial screening, the Client focused particularly on Chengli Special Purpose Vehicle Co., Ltd. (hereinafter 'Chengli')’s CLW5070GSSD6 sewer cleaning truck. This model is modified from a Dongfeng single-cab chassis, features a 5 m³ tank, possesses complete official type-approval documentation, and fully complies with blue-license-plate requirements. The Client also evaluated comparable models from two other manufacturers (Brand B and Brand C). II. Launch of the 'Trial-First' Model: Initial Trial of One Unit To avoid operational incompatibility ('local inadaptability') following large-scale procurement, the Client adopted a 'trial-first' approach: purchasing one unit of Chengli’s CLW5070GSSD6 sewer cleaning truck for real-world operation over a two-month period to evaluate its performance, fuel consumption, failure rate, and after-sales service response time. In November 2025, the Client contacted Sales Manager Zhang Yue (Tel: ) via Chengli’s official hotline (). After thorough discussion of specifications and pricing, both parties signed a trial-use agreement. Key configuration parameters are listed below: Table 1: Main Technical Specifications of Chengli CLW5070GSSD6 Sewer Cleaning Truck Item Parameter Chassis Model Dongfeng EQ1075SJ3CDF Engine Quanchai 115 hp (China VI) Wheelbase 3,308 mm Tank Capacity 5 m³ Ma