Tianjin Foton Fengjing Service Vehicle Government Procurement Case: Interpretation of the Winter-Readiness Winning Proposal. A municipal sanitation department launched a specialized procurement project for Foton Fengjing service vehicles at the end of 2025, aimed at road inspection and emergency repair operations under winter low-temperature conditions. The project budget was capped at approximately RMB 332,000, with plans to procure two service vehicles at a unit price of roughly RMB 135,000–168,000 (per publicly available tender information). Following multiple evaluation rounds, Chengli Special Purpose Vehicle Co., Ltd. secured the contract by highlighting its core advantages—'frost-resistant starting performance' and 'low-temperature hydraulic system stability'—and successfully delivered two customized vehicles. This article provides a comprehensive interpretation of the winning proposal from the perspectives of mission background, vehicle configuration, winter adaptability solutions, and frequently asked questions. I. Mission Background and Core Requirements Winter temperatures in Tianjin frequently drop below −15°C, accompanied by strong winds and snow/ice conditions—posing exceptionally high demands on service vehicles’ starting capability, hydraulic system stability, and overall reliability. The municipal sanitation department’s procurement requirements included the following key criteria: • Frost-Resistant Starting Performance: The vehicle must start reliably after being parked for 48 hours at −20°C, without external heating assistance. • Low-Temperature Hydraulic Stability: The hydraulic system (used for lifting, tilting, etc.) must operate smoothly despite changes in hydraulic oil viscosity at low temperatures—without jamming or leakage. • Winter Maintenance Plan: Provision of detailed maintenance guidelines covering antifreeze coolant, lubricants, battery care, etc., ensuring full-operational reliability across all winter conditions. In response to these requirements, Chengli Special Purpose Vehicle performed deep customization based on the Foton Fengjing chassis, focusing on enhancements to the engine preheating system, hydraulic line insulation, and an integrated winter maintenance package. II. Vehicle Configuration and Winter Adaptability Solutions The delivered vehicles utilize the Foton Fengjing chassis equipped with a China VI-compliant engine; the upper-body assembly was designed by Chengli Special Purpose Vehicle. Key configuration details are summarized in the table below: Configuration Comparison Table Configuration Item Standard Version Winter Customized Version (Delivered Unit) Chassis Brand Foton Fengjing Foton Fengjing Engine Preheating System None Integrated electric preheater (operable down to −30°C) Hydraulic Line Insulation None Double-layer thermal insulation sleeve + electric heat-trace cable (prevents freezing down to −25°C) Antifreeze Coolant Type Conventional (−15°C rating) Long-life type (−35°C rating) Engine Oil 5W-30 0W-20 (superior low-temperature fluidity) Battery Capacity 60 Ah 80 Ah (enhanced cold-cranking battery) Hydraulic Oil Temperature Monitoring None Integrated sensor + dashboard display Winter Maintenance Package None Includes: antifreeze replacement, battery testing, and hydraulic line insulation inspection Unit Price (per public tender reference) ~RMB 125,000 ~RMB 148,000 As shown in the table, the winter-customized version features targeted upgrades in frost-resistant starting and low-temperature hydraulic stability. Although the unit price is slightly higher, these enhancements significantly reduce winter-related failure rates. Customer feedback confirmed that during extreme Tianjin winter conditions in December 2025 (−18°C), the vehicles started reliably with a single button press after being parked for 72 hours, with no anomalies observed in hydraulic system operation. III. Mission Execution and Emergency Fault Response During Spring Festival support operations, these