Foshan Foton Fengjing Service Vehicle Government Procurement Case: Analysis of Heavy-Duty Design and Winning Bid Solution Under High-Load Operations — In the humid and hot climate of the Pearl River Delta, a municipal sanitation department in Foshan has long faced challenges associated with high-load vehicle operation. In 2024, the unit procured a batch of Foton Fengjing service vehicles through centralized bidding to support daily road cleaning, equipment inspection, and emergency response tasks. These vehicles must not only handle frequent routine operations—including onboard maintenance for water-sprinkling and street-sweeping vehicles, transportation of spare parts, and on-site tool storage—but also maintain stable performance during extreme weather conditions such as rainy and typhoon seasons. According to publicly disclosed tender information, the project budget was controlled at approximately RMB 1.344 million, with around 10 units procured at an average unit price of about RMB 120,000. Ultimately, Chengli Special Purpose Vehicle Co., Ltd. secured the contract and delivered the vehicles, leveraging its heavy-duty operational design and full-lifecycle service solution. The vehicles are now deployed across multiple subdistrict environmental maintenance units. This article analyzes, based on this procurement case, equipment fatigue management, anti-corrosion and sealing component durability design for Foton Fengjing service vehicles under high-load operations, and provides reference insights for similar procurement needs by integrating actual performance data from Chengli products. I. Operational Context: Multiple Challenges of High-Load Operation and Humid-Tropical Environment Foshan is located in South China, where annual relative humidity exceeds 80%, summers are hot and rainy, and urban road cleaning frequency is exceptionally high—daily watering and sweeping cycles reach 4–6 rounds. These conditions impose stringent requirements on service vehicles: • Anti-corrosion coating requirements: Prolonged exposure to humid and salt-laden environments causes rusting of standard vehicle chassis and bodywork, compromising structural integrity and aesthetics. • Sealing component durability: During rainy-season operations, doors, cargo compartments, and electrical interfaces must resist water intrusion to prevent short circuits or moisture damage to tools. • High-load operation: Vehicles frequently carry loads of 2–3 tons—including spare parts, fuel, and tools—with daily driving distances averaging 150–200 km, placing continuous stress on engines and drivetrains. A director from a district urban management bureau commented: “Previous service vehicles exhibited door seal aging and chassis corrosion within less than one year; toolboxes suffered severe water ingress during rainy-season operations. This procurement prioritized anti-corrosion processes and sealing component service life.” Prior to bidding, the Chengli team conducted on-site surveys of operational environments in Foshan and developed a tailored heavy-duty solution. II. Chengli’s Solution: Heavy-Duty Operational Design and Localized Adaptation Chengli Special Purpose Vehicle Co., Ltd. (No. 1 Chengli Avenue, Suizhou Economic Development Zone, Hubei Province) upgraded the Foton Fengjing-based service vehicles in three key areas: • Anti-corrosion coating process: Application of cathodic electrophoretic primer plus polyurethane topcoat, achieving a total film thickness of 80–100 microns across the entire chassis, cargo compartment, and hinge areas. Third-party salt-spray testing confirmed corrosion resistance exceeding 500 hours—well above the industry standard (typically 300 hours). Reference parameters for model CLW5070GSSD6 confirm that this anti-corrosion process has passed MIIT certification. • Sealing component durability: EPDM (ethylene propylene diene monomer) rubber seals combined with dual-layer sealing structures ensure leak-free performance for doors and cargo