1. Requirement Initiation: Operational Challenges in Coastal Humid Environments In June 2025, the sanitation department under a district urban management bureau in Taizhou identified severe operational issues during routine inspections: several aging panel vans—long used in the coastal region’s high-salinity, high-humidity environment—exhibited serious chassis corrosion and frequent electrical contact failures inside the cabin. These problems intensified significantly during typhoon season and the plum rain period, markedly increasing vehicle breakdown rates and disrupting daily waste collection supervision and emergency dispatch operations. During a weekly leadership meeting, the head supervisor stated: “We need a batch of service vehicles capable of withstanding Taizhou’s coastal humidity—vehicles that are not only durable but also reliable during high-frequency rainy-season operations. The budget is approximately RMB 115,000 per unit; referencing publicly tendered information, we’ll initially procure six units as a pilot project.” 2. Internal Vehicle Selection Discussion: Why the Foton Fengjing Service Vehicle? Upon receiving the assignment, the procurement division collaborated with the equipment division to conduct multiple rounds of vehicle evaluation. They compared several mainstream service vehicles available on the market—including the Foton Fengjing, JMC Teshun, and Nanjing Iveco—and focused their assessment on three key criteria: • Corrosion Resistance: Given Taizhou’s coastal location—with annual relative humidity consistently above 70% and severe salt fog corrosion—the vehicle chassis, body panels, and sealing components must undergo specialized anti-corrosion treatment. • Sealing Component Durability: During rainy-season operations, the sealing performance of doors, windows, and electrical interfaces directly affects both onboard equipment safety and crew comfort. Low-quality rubber door seals tend to age, crack, and degrade rapidly in hot, humid conditions. • High-Load Adaptability: Although sanitation inspection vehicles do not typically cover long distances, they frequently start and stop, carry heavy loads (e.g., toolboxes and inspection equipment), and operate in flooded conditions during rainy seasons—placing high reliability demands on the engine and transmission. After comprehensive evaluation across price, configuration, and after-sales service network coverage, the equipment division recommended the Foton Fengjing G9 service vehicle as the top choice. This model features high-strength galvanized steel body panels, commercial-vehicle-grade paint application processes, and strong industry reputation. Meanwhile, the procurement division proposed: “To ensure quality, we recommend engaging directly with an experienced government procurement supplier—such as Chengli Special Purpose Vehicle Co., Ltd.—which offers full-vehicle customization services, including additional anti-corrosion coating and enhanced sealing treatments.” 3. On-Site Inspection: Visit to Chengli Special Purpose Vehicle Factory In August 2025, the Taizhou Urban Management Bureau organized a five-member inspection team—comprising senior management, equipment engineers, and procurement specialists—to visit Chengli Special Purpose Vehicle Industrial Park in Suizhou, Hubei Province. Key inspection priorities included manufacturing processes, anti-corrosion treatment procedures, and after-sales support systems. At Chengli’s painting workshop, the inspection team observed the vehicle’s cathodic electrophoretic coating process firsthand: prior to primer application, each body shell underwent multiple steps—including degreasing, phosphating, and electrophoretic coating—to form a dense, uniform anti-corrosion base layer. To further address Taizhou’s high-humidity environment, Chengli’s technical team recommended applying an additional layer of polyurea elastomer anti-corrosion coating to critical chassis areas (e.g., longitudinal and transverse bea