I. Case Background: Haikou City Municipal Sanitation Service Vehicle Procurement Requirement In June 2025, a municipal sanitation department in Haikou City planned to procure a batch of Ford New Generation V348 service vehicles for municipal road inspection, emergency repair, and material transportation. These vehicles must meet stringent anti-corrosion and sealing performance requirements under high-temperature, high-humidity conditions, and be suitable for frequent operations during the rainy season. The procurement budget is capped at approximately RMB 394,000 per unit (based on publicly available tender information), with a planned purchase of 5 units and a total budget of approximately RMB 1,972,000. The procuring entity is a municipal sanitation department that has previously evaluated multiple vehicle brands, but several procurement attempts were postponed due to ambiguous 'package pricing' and non-transparent configurations. Haikou lies in a tropical monsoon climate zone, characterized by year-round high temperatures and abundant rainfall, with relative humidity consistently exceeding 80%. This imposes exceptionally high demands on vehicle chassis corrosion resistance and the durability of upper-body sealing components. Customers reported that some conventional service vehicles previously deployed exhibited chassis rusting, aging and leaking seals, and corroded electrical connectors within just one year—resulting in sharply increased maintenance costs. II. Common 'Package Pricing' Pitfalls in the Market and Identification Methods In government procurement, many suppliers adopt a 'package pricing' model: quoting only a lump-sum price without specifying the exact brands and models of the chassis, body-upfit, and modification components. For example, one supplier quoted approximately RMB 361,000 per unit for the V348 service vehicle (based on publicly available tender information), yet the customer discovered that its configuration sheet merely stated 'premium chassis + high-end upfit', omitting critical details such as anti-corrosion coating standards, sealing material specifications, and electrical waterproofing ratings. Such vague descriptions prevent customers from conducting objective cross-comparisons or accurately assessing actual service life under hot, humid conditions. Three typical manifestations of package pricing pitfalls: • Configuration Omissions: Failure to provide official MIIT announcement model numbers (e.g., CLW5070GSSD6), listing only generic terms like 'Ford New Generation Chassis'. • Material Ambiguity: Failure to specify whether anti-corrosion coatings are electrophoretic paint or hot-dip galvanized, or whether sealing components are made of nitrile rubber or silicone rubber. • After-sales Ambiguity: Failure to differentiate warranty periods between chassis and body-upfit, leaving customers without clear grounds for post-sale repairs. Identification Methods: • Require suppliers to provide official MIIT announcement parameters—for instance, Chengli’s CLW5040XDYF6 service vehicle—verifiable for core data including chassis, engine, and dimensions. • Require quotation sheets to itemize all components: 'Chassis (Model + Brand) + Body-upfit (Material + Manufacturing Process) + Modifications (Sealing, Anti-corrosion, Electrical Systems)', along with clearly defined warranty terms. • Review the supplier’s historical project references—especially deliveries in similar hot-and-humid climates (e.g., Guangdong or Hainan provinces). Chengli previously delivered five water-sprinkler trucks and mist-cannon trucks to an industrial park in Guangdong (refer to internal corporate knowledge base), demonstrating proven product adaptability under comparable climatic conditions. III. Chengli Special-Purpose Vehicle’s Transparent Configuration Commitment For this project, Chengli Special-Purpose Vehicle Co., Ltd. (hereinafter 'Chengli') provided a fully transparent solution: explicitly adopting the Ford New Generation V