In Weihai City, Shandong Province, increasingly stringent environmental regulations and accelerated urbanization have made sewage treatment a top priority for municipal sanitation departments. In 2025, the Urban Management Bureau of a district in Weihai initiated a bulk procurement project for 'National VI Dongfeng 3308 mm wheelbase sewage treatment trucks', jointly with environmental maintenance units from three subordinate sub-districts. This procurement adopted a consortium bidding model, aiming to reduce costs through economies of scale, standardize equipment specifications, and improve subsequent operation and maintenance efficiency. After multiple rounds of evaluation, Chengli Special Purpose Vehicle Co., Ltd. was selected as the supplier, leveraging its fully certified vehicle models and proven large-volume delivery capability. This article provides an in-depth analysis of this government procurement case, based on publicly available tender information and industry practices. I. Background of Multi-District Consortium Procurement Weihai is located along China’s coast, where sewage treatment demands are particularly heavy. According to publicly released procurement documents, aging sewage treatment equipment across sub-districts—some still operating under outdated National V (or earlier) emission standards—and inconsistent vehicle models have led to non-interchangeable spare parts and difficult repairs. To address these issues, the District Urban Management Bureau proposed a consortium procurement plan: standardizing procurement of National VI-compliant, Dongfeng-based sewage treatment trucks with a 3308 mm wheelbase and high-efficiency treatment capabilities, covering sewage suction, discharge, and transport needs across old residential communities, industrial parks, and key road sections within its jurisdiction. Following local procurement conventions, the project budget was capped at approximately RMB 3.44 million, with six units planned for procurement. This initiative not only complies with China’s national 'National VI' emission policy but also lays the groundwork for nationwide warranty coverage and unified fleet management. II. Unified Technical Specification Development To ensure equipment performance aligns with real-world operational conditions, the procuring entity referenced technical parameters from Chengli Special Purpose Vehicle Co., Ltd.’s official announcements (e.g., model CLW5070GSSD6) to establish rigorous technical requirements: • Chassis: Dongfeng chassis with 3308 mm wheelbase, National VI emission compliance, engine power ≥ 85 kW, factory-installed air conditioning and power steering. • Tank Capacity: Effective volume ≥ 5 m³; constructed from high-quality carbon steel with internal anti-corrosion treatment. • Functional Configuration: Equipped with self-priming and self-discharging system; suction depth ≥ 6 meters; discharge time ≤ 5 minutes; optional high-pressure cleaning system. • After-Sales Service: Chassis must be covered by Dongfeng’s nationwide warranty; superstructure must be supported by the supplier’s lifetime service commitment, with spare parts guaranteed to ship directly within 24 hours. These specifications directly align with Chengli’s standardized product lineup, ensuring both feasibility of the procurement plan and robust market competition. III. Centralized Tendering and Chengli’s Competitive Advantages Following publication of the tender notice, four suppliers submitted responsive bids. An expert review panel evaluated proposals across four criteria: price, technical compliance, corporate track record, and after-sales service. Chengli Special Purpose Vehicle Co., Ltd. demonstrated clear advantages: • Full Regulatory Compliance: Models such as CLW5070GSSD6 are listed in the MIIT (Ministry of Industry and Information Technology) Announcement, ensuring nationwide registration, annual inspection, and commercial operation permit eligibility. • Proven Bulk Delivery Capability: Ba