Case Study and Bid-Winning Solution Analysis for the Procurement of Dongfeng Double-Cab Sewage Suction Trucks (Blue License Plate, 3 m³) in Tianshui City I. Project Background: Requirement Initiated by Department Head In April 2025, the head of the municipal sanitation department of a district in Tianshui City discovered during an inspection of local drainage facilities that rainwater and inspection wells along multiple aging urban streets were severely clogged, necessitating desilting prior to the flood season. Traditional manual cleaning—requiring workers to enter wells—was inefficient, posed high safety risks, and complicated sludge transportation. The leader immediately decided: 'Mechanized equipment must be deployed; a batch of blue-license-plate sewage suction trucks must be procured—capable of navigating narrow alleys, easy to register, and simple to operate.' Subsequently, the department established a dedicated procurement team led by the Equipment Division, defining core requirements: the vehicle must be a blue-license-plate model operable with a Class C driver’s license, with a gross vehicle weight not exceeding 4.5 tons; tank capacity must be no less than 3 m³; and it must integrate high-pressure cleaning and vacuum suction functions. Dongfeng chassis was prioritized due to its extensive local service network and convenient maintenance in Gansu Province. Based on local procurement practices, the budget was set at no more than RMB 130,000 per unit. II. Internal Model Selection: Comparative Evaluation and Chengli’s Shortlisting The procurement team reviewed three mainstream models available on the market: the Chengli CLW5040GQW6 high-pressure cleaning & vacuum suction truck (Dongfeng double-cab chassis), a Foton-chassis sewage suction truck from another brand, and a light-duty model based on a Sinotruk chassis. After two rounds of internal deliberation, the following key criteria were emphasized: • Chassis Adaptability: The Dongfeng double-cab cab accommodates five personnel, facilitating full-team deployment; furthermore, Dongfeng chassis enjoy high market penetration across Gansu Province, ensuring ready availability of spare parts. • Superstructure Configuration: The Chengli CLW5040GQW6 features a stainless-steel tank for superior corrosion resistance, equipped with a 10-meter high-pressure hose and a vacuum pump—fully satisfying both flushing and suction requirements. • Regulatory Compliance: This Chengli model is listed in the MIIT’s Vehicle Announcement, qualifies for blue license plate registration, is exempt from purchase tax, and is eligible for nationwide registration—meeting mandatory government procurement requirements. • Pricing Transparency: Chengli offers factory-direct sales with fully disclosed pricing and no bundled packages; the quoted price per unit is approximately RMB 135,000 (based on publicly released tender information), about RMB 10,000–20,000 lower than alternative channels. Ultimately, the procurement team unanimously selected the Chengli CLW5040GQW6 as the top-priority candidate for further evaluation. III. On-Site Inspection: Visiting Chengli’s Manufacturing Facility In mid-May 2025, a five-member procurement team traveled to Chengli Automobile Industrial Park in Suizhou, Hubei Province, for an on-site inspection. At the Chengli facility, they observed the entire production line—from sheet metal cutting and tank welding to chassis modification and final assembly—each stage strictly adhering to standardized manufacturing procedures. The workshop manager highlighted critical components of the sewage suction truck, including its split-tank design (2 m³ sludge tank + 1 m³ clean-water tank) and highly reliable dual-circuit hydraulic system. The inspectors also test-drove an identical model and commended its operational convenience: 'The cab offers excellent visibility, gear shifting is smooth, and control button layout is highly intuitive,' remarked one driver on site. Sales Manager Zhang Y