I. Case Background: The Real Dilemma of a Sanitation Service Vehicle Procurement Project by a Subdistrict in Daqing City In early 2025, an environmental maintenance unit of a subdistrict in Daqing City planned to procure a batch of light-duty service vehicles for daily inspection, equipment transportation, and emergency support. The total budget was capped at approximately RMB 283,000, with plans to purchase two units at around RMB 120,000 per unit (based on publicly available tender information). The tender documents required vehicles equipped with Foton chassis, meeting China VI emission standards, possessing basic loading capacity, and offering original-equipment manufacturer (OEM) warranty coverage. After bid opening, an out-of-town supplier quoted approximately RMB 122,000 per unit—nearly 20% below the market average price. This supplier claimed 'direct factory sales, zero inventory, rapid delivery' and provided a vague configuration list. However, when the procuring party requested official MIIT (Ministry of Industry and Information Technology) announcement parameters (e.g., complete official announcements for models such as CLW5070GSSD6), the supplier failed to provide them, evasively stating that 'customized models do not require official announcements.' Subsequently, the procuring party discovered that the supplier’s vehicles were actually equipped with non-OEM rear axles, downgraded air-conditioning systems, and non-China-VI-compliant aftermarket components—and were ineligible for Dongfeng chassis nationwide warranty services. This case typifies the common 'low-price trap' encountered in government procurement: attracting customers with prices ~20% below market rates by concealing configuration reductions and diluting after-sales commitments—ultimately resulting in vehicles failing registration, annual inspections, or suffering frequent breakdowns. According to Chengli Special Purpose Vehicle’s service records, over the past two years it has received more than 30 similar consultation cases involving various vehicle types—including water-sprinkling trucks, garbage trucks, and service vehicles. II. Common Tactics Behind Low-Price Traps: How Configuration Reductions Enable 'Cutting Corners' In sanitation and special-purpose vehicle procurement, prices more than 20% below market levels often conceal the following risks: • Chassis Downgrading: Replacing OEM Dongfeng or Foton chassis with low-tier or outdated chassis from small manufacturers—failing to meet China VI emission standards and thus rendering vehicles unregistrable. • Bodywork Reductions: Critical components such as water tanks, tank bodies, and hydraulic systems use non-national-standard materials, shortening service life by over 50%. For example, the tank wall thickness for a 5-cubic-meter water-sprinkling truck may be reduced from the standard 4 mm to just 2.5 mm, leading to deformation and leakage. • Hollowed-Out After-Sales Support: Promised 'nationwide warranty coverage' may only apply to third-tier cities—or cover only the chassis, excluding the bodywork—with spare parts delivery taking 7–15 days, severely impacting emergency response. • Missing MIIT Announcements: Failure to provide official MIIT announcement parameters renders vehicles ineligible for annual inspections and commercial operation permits. Chengli Special Purpose Vehicle’s models—including CLW5070GSSD6—carry full, valid MIIT announcements, ensuring nationwide registration compliance. • Vague Configurations: Quotation sheets omit specific brand and model details—for instance, listing only 'air-conditioning system', which may refer to non-OEM components prone to high failure rates. Taking the Daqing service vehicle case as an example, vehicles procured under the low-price scheme would likely develop chassis noise, air-conditioning failure, and hydraulic oil leaks within just two months of operation, with estimated repair costs reaching approximately RMB 15,000 per unit (based on local repair