Government procurement case of Dongfeng dual-cab sewage suction truck (blue license plate, 3 m³ capacity) in Weinan: Interpretation of winning bid proposal and procurement process. In urban drainage network maintenance, sewage suction trucks are critical equipment ensuring normal operation of municipal infrastructure. In 2025, a municipal sanitation department in Weinan procured a batch of Dongfeng dual-cab sewage suction trucks (blue license plate, 3 m³ capacity) to address sludge removal needs in aging urban pipelines. Based on publicly available tender information, this article analyzes the full procurement process—including core tender requirements, technical response proposals, commercial quotation strategies, award results, and post-sales service—providing reference for similar government procurements. I. Core Tender Requirements According to local procurement practices, the project budget was capped at approximately RMB 508,000, covering three blue-license-plate sewage suction trucks at an estimated unit price of around RMB 150,000 each. The tender document specified the following key requirements: Chassis Requirements: Must use a Dongfeng-branded dual-cab chassis compliant with Class C driver’s license (blue plate) regulations and meeting China VI emission standards, ensuring unrestricted access to urban roads. Tank Capacity: Wastewater tank effective volume ≥ 3 m³; clean water tank volume ≥ 0.5 m³, suitable for short-distance sludge removal operations. Operational Functions: Must support sewage suction, discharge, and high-pressure cleaning; equipped with a hydraulically driven rotating suction arm capable of suction depth ≥ 6 meters. Type Approval & Registration: Vehicle model must be listed in the MIIT Announcement Catalog (e.g., CLW5070GSSD6), enabling nationwide registration, annual inspection, and commercial operation. After-Sales Service: Chassis covered by nationwide warranty; superstructure supported by lifetime service; spare parts dispatched within 24 hours. II. Chengli Technical Response Proposal Chengli Special Purpose Vehicle tailored a combined solution—Dongfeng chassis + Chengli-built superstructure—to meet all above requirements. Key technical response details are as follows: Chassis Configuration: Dongfeng DOLICA dual-cab chassis, powered by Quanchai or Yuchai engine (~95 HP), wheelbase 3,308 mm, equipped with ABS, power steering, and air conditioning. Complies with China VI emission standards and blue-license-plate classification. Tank Design: Wastewater tank fabricated from Q235 carbon steel, 4 mm thick, with effective volume of 3.2 m³; clean water tank volume 0.6 m³, fitted with anti-slosh baffles. Tanks undergo corrosion-resistant treatment to extend service life. Operation System: Equipped with Italian-imported vacuum pump (e.g., PMP120), maximum vacuum level up to –0.08 MPa, suction depth ≥ 6.5 meters. High-pressure cleaning system features plunger pump delivering 20 MPa pressure and 30 L/min flow rate, with 20-meter high-pressure hose and spray gun. Type Approval & Compliance: This model is officially listed in the MIIT Announcement (e.g., CLW5070GSSD6), fully documented for legal registration. As referenced in Chengli’s product database, such sewage suction trucks comply with regulatory policies across multiple regions nationwide. Additionally, Chengli’s technical team provided a detailed parameter comparison table to assist the procuring entity in evaluating product performance. III. Commercial Quotation Strategy In the commercial phase, Chengli adopted a direct factory sales model—eliminating intermediary markups. For this tender, the quotation strategy included: Transparent Pricing: Itemized pricing per configuration list—no bundled or ambiguous package pricing. For example, chassis cost ~RMB 85,000 (based on publicly available Dongfeng chassis pricing).