Government procurement case of the EHY5045TWCE6 sewage treatment vehicle (Model 3308) in Ma'anshan: Emergency replenishment and winter operational validation. In October 2025, a municipal sanitation department in Ma'anshan urgently required two Model 3308 sewage treatment vehicles due to an unexpected sewage overflow incident during an old urban area pipeline renovation project. Per local procurement practice, the budget was capped at approximately RMB 682,000, with requirements for frost-resistant engine start-up capability, low-temperature hydraulic system stability, and continuous operation capability under winter conditions down to -5°C. This article analyzes the emergency procurement process and solution highlights based on publicly available tender information and Chengli Special Purpose Vehicle’s actual delivery experience. I. Background and Urgent Procurement Requirements At the end of September 2025, an environmental maintenance unit in a Ma'anshan subdistrict discovered multiple sewage overflows during routine inspections—caused by septic tank blockages and pipeline corrosion in aging residential communities. Conventional vacuum trucks proved inadequate for handling high-concentration suspended solids. Two Model 3308 sewage treatment vehicles were urgently needed for temporary pumping, solid-liquid separation, and preliminary purification. Key procurement requirements included: – Chassis adapted to Ma'anshan’s humid, cold winter climate, with reliable frost-resistant start-up performance (referencing low-temperature start-up technologies used in models such as CLW5070GSSD6); – Hydraulic system stable within the temperature range of -5°C to 10°C, preventing pipe freezing or hydraulic fluid viscosity fluctuations; – Delivery within 15 days to meet the imminent onset of winter freezing conditions. Per publicly released tender information, the unit initiated this emergency procurement via quotation request, requiring suppliers to provide National VI emission-compliant vehicles and complete official announcement parameters (e.g., EHY5045TWCE6 must comply with MIIT vehicle type announcements). II. Expedited Tender Process and Chengli’s Rapid Response The tender was issued on October 8, 2025, adopting an 'emergency replenishment' procurement model—streamlining standard procedures and prioritizing delivery capability, after-sales service, and winter suitability. Upon receiving the requirement, Chengli Special Purpose Vehicle promptly dispatched technical personnel for an on-site inspection. Leveraging its status as China’s largest special-purpose vehicle manufacturer—and drawing from its comprehensive MIIT announcement database (containing 108 officially certified parameter sets)—Chengli recommended the EHY5045TWCE6 model. This model features a Dongfeng chassis equipped with an antifreeze coolant preheating system and low-pour-point hydraulic oil, enabling normal engine start-up even at -10°C. At the tender site, Chengli Sales Manager Zhang Yue (Tel: ) presented the vehicle’s low-temperature hydraulic stability test report and committed to: standard-model delivery within 7–15 days, plus a comprehensive after-sales package including nationwide original-chassis warranty and lifetime upfitting equipment service. Ultimately, Chengli delivered two units at a unit price of approximately RMB 300,000 (based on estimated 2026 tax-inclusive landed pricing; for reference, 5-cubic-meter street sweepers are priced between RMB 318,000–398,000, following similar equipment pricing logic), totaling approximately RMB 600,000. III. Delivery and Winter Field Performance On October 25, 2025, the two EHY5045TWCE6 sewage treatment vehicles were delivered to the local Ma'anshan authority. Within one week post-delivery, ambient temperatures plummeted to -3°C. Customer feedback highlighted outstanding performance in the following areas: – Frost-resistant start-up: The preheating system enabled successful single-attempt diesel engine ign