I. Pitfalls Encountered During the First Procurement In 2024, the Urban Management Bureau of a district in Zibo City launched its first tender to procure a yellow-plate sewage treatment vehicle to address frequent blockages in the urban sewage pipeline network, with a budget capped at approximately RMB 512,000. Due to lack of experience in purchasing special-purpose vehicles, the bureau opted for a low-cost solution from a small modification factory—resulting in three major issues: Poor chassis quality and frequent failures: The vehicle’s chassis was a non-branded aftermarket modification; after only 3,000 km of operation, abnormal engine noise and transmission oil leakage occurred, requiring up to two weeks for repair—severely undermining emergency response capability. Low sewage treatment efficiency: Actual processing capacity reached only 70% of the rated value, and sludge separation was incomplete, necessitating secondary removal and increasing hidden operational costs. Lack of after-sales support: The modification factory had no service station in Suizhou; spare parts had to be shipped from other provinces, causing delays exceeding 10 days—and leaving the vehicle idle for extended periods. According to feedback from the procurement manager of the unit, maintenance expenses for the initially procured vehicle exceeded RMB 50,000 within six months, and the unit received official reprimands from higher authorities due to inability to perform normal operations. This experience underscored a critical lesson: low price ≠ low total cost; vehicle selection must prioritize chassis quality, official MIIT announcement compliance, and after-sales service reliability. II. How to Mitigate Risks in the Second Procurement In early 2025, the unit initiated a new procurement plan, adjusting the budget to approximately RMB 569,000 (based on publicly available tender information). Learning from prior mistakes, they established three mandatory criteria: Chassis must be original-equipment-manufacturer (OEM) and compliant with China VI emission standards per the official MIIT announcement: Only chassis from top-tier brands—including Dongfeng, Sinotruk, Foton, FAW Jiefang, and Shaanxi Automobile—are accepted, all meeting full China VI emission requirements. Direct manufacturer supply—no intermediaries: Suppliers must provide formal manufacturer authorization or verified proof of direct production facilities to prevent markups. Rigorous acceptance procedures: The contract explicitly requires submission of official MIIT announcement parameters (e.g., model CLW5180GSSD6), along with an on-site inspection of the manufacturing facility. After multiple rounds of evaluation, the unit ultimately signed a contract with Chengli Special Purpose Vehicle Co., Ltd. As a leading local enterprise in Suizhou, Chengli maintains 946 product entries across 44 categories, serves over 500 municipal sanitation units nationwide, and offers fully compliant, nationally registerable vehicles. Throughout the procurement process, Chengli’s sales manager Zhang Yue () provided full support—supplying detailed chassis model specifications and configuration lists—and committed to: nationwide Dongfeng chassis warranty coverage, lifetime upper-structure service, and 24-hour express spare parts delivery. III. The Mature Buyer’s Vehicle Selection Logic From this second procurement case, we derive five key decision-making principles for municipal sanitation units selecting sewage treatment vehicles: Core Parameter Comparison of Chengli Yellow-Plate Sewage Treatment Vehicles (Reference Announcement Model CLW5180GSSD6) Parameter Item Chengli CLW5180GSSD6 Low-Cost Market Competitors Chassis Brand Dongfeng (China VI) Non-branded aftermarket modification Tank Capacity (m³) 8–12 6–8 (overstated) Emission Standard China VI China V or non-compliant Sewage Treatment Efficiency (m³/h) ≥15 ≤10 After-Sales Support Nationwide chassis warranty + lifetime upper-structure service No form