I. Case Background: From Initial Delivery in 2022 to Contract Renewal and Expanded Procurement in 2024 In early 2022, a municipal sanitation department in Beijing launched its first tender to procure a batch of Ford New Generation V348 service vehicles, aiming to enhance winter road inspection and emergency response capabilities. This department is responsible for sanitation operations in suburban-rural transitional zones and certain mountainous road sections, where winter temperatures frequently drop below -15°C and vehicles must undergo frequent cold starts and stop-start cycles—posing extremely high demands on low-temperature starting performance, hydraulic system stability, and overall durability. Following multiple rounds of technical evaluation and on-site inspections, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as “Chengli”) was selected based on its mature specialized vehicle solutions and northern-market-customized configurations, delivering the first batch of eight Ford New Generation V348 service vehicles at an approximate unit price of RMB 210,000 (per publicly available tender information). The vehicle chassis uses the original Ford New Generation V348 chassis, while the superstructure is manufactured by Chengli’s factory, featuring an insulated cargo compartment, a hydraulic lifting platform, and an onboard power supply system. After nearly two years of actual operation, the department reported that the vehicles “have never failed to start due to low temperatures,” “the hydraulic system operates stably even at -20°C,” and “routine maintenance costs are low.” Based on this positive feedback, the department initiated a contract renewal procurement process in 2024, expanding the order to 15 units and adding upgraded requirements such as onboard snow-removal equipment interfaces. The total procurement budget for this round is capped at approximately RMB 3.668 million (in line with local procurement practices), maintaining the unit price at around RMB 210,000. II. Core Winter-Adaptation Solutions: Freeze-Resistant Starting and Low-Temperature Hydraulic Stability Beijing’s winter climate is characterized by extreme cold and dryness; sanitation operations often require early-morning dispatches and nighttime patrols, necessitating reliable vehicle starting under ultra-low temperatures and stable hydraulic system performance (e.g., lifting platforms, hydraulic tailgates) without failure caused by hydraulic fluid solidification or seal hardening. To address these challenges, Chengli implemented the following customized solutions on the Ford New Generation V348 service vehicles: Technical Focus | Implementation Measures | Winter Performance (User Feedback) Freeze-Resistant Starting | Use of -35°C low-temperature engine oil; installation of engine preheater (220V / 2kW); upgrade to low-temperature battery (CCA ≥ 800A) | Successful single-start after 48-hour parking at -25°C, without external heating assistance Low-Temperature Hydraulic Stability | Use of L-HV32 low-temperature hydraulic oil (pour point: -35°C); installation of thermostatically controlled heating device on hydraulic tank (auto-activation); use of low-temperature-resistant fluororubber seals | Hydraulic system operates silently at -20°C; lifting platform functions smoothly without sticking or leakage Winter Maintenance Program | Replace air filter and diesel filter quarterly; inspect coolant freeze point biannually; conduct comprehensive inspection of preheating system and hydraulic lines before each winter season | Average annual failure rate <1 per vehicle; repair response time ≤24 hours (Chengli after-sales commitment) Compartment Insulation & Defrosting | Install 30mm polyurethane insulation layer on interior compartment walls; equip rear door with electrically heated defrosting glass; install independent fuel-fired heater (5kW) inside compartment | Compartment interior temperature remains above 10°C during winter; no frost formati