Project Overview: Procurement of a 3308 Sewage Treatment Vehicle by a Municipal Sanitation Department in Dalian According to publicly available tender information, a municipal sanitation department in Dalian launched a procurement project for one 3308 sewage treatment vehicle (model EHY5045TWCE6) in late 2025, with a budget capped at approximately RMB 402,000. The project aims to enhance local sewage treatment capacity—particularly under winter low-temperature conditions—to ensure continuity and stability of sewage treatment operations. Following open evaluation, Chengli Special Purpose Vehicle Co., Ltd. secured the contract, distinguished by its product’s freeze-resistant starting performance, low-temperature hydraulic stability, and comprehensive after-sales service plan. The vehicle has now been delivered and commissioned. Customer feedback confirms normal startup and operation even at -15°C, demonstrating excellent winter performance. Analysis of Chengli’s Tender Win: When procuring sanitation vehicles for high-cold regions such as Dalian, vehicle startup and operational performance under low temperatures are critical evaluation criteria. Chengli Special Purpose Vehicle won the bid primarily due to the following strengths: • Optimized Freeze-Resistant Starting Performance: The EHY5045TWCE6 is equipped with a low-temperature preheating system—including engine and hydraulic oil preheating—ensuring reliable startup even at -20°C. This design draws upon Chengli’s extensive delivery experience in Northeast China, such as the identical model supplied to a sanitation station in Heilongjiang Province in 2024. • Low-Temperature Hydraulic Stability: The vehicle employs low-temperature-resistant hydraulic oil and seals, preventing hydraulic fluid solidification or leakage under cold conditions—thus ensuring continuous, stable sewage suction and discharge operations. Technical documentation for other Chengli models (e.g., CLW5070GSSD6) further reflects the company’s accumulated expertise in hydraulic system engineering. • Winter Maintenance Program: Chengli provides customers with a detailed winter maintenance manual covering antifreeze replacement intervals, insulated tank measures, etc. Additionally, it guarantees nationwide Dongfeng chassis warranty coverage, lifetime upfit service, and 24-hour direct shipment of spare parts—effectively addressing customer concerns. • Complete Regulatory Compliance: The EHY5045TWCE6 model holds full MIIT (Ministry of Industry and Information Technology) certification, enabling standard registration, annual inspection, and commercial operation nationwide—including compliance with Dalian’s local vehicle management requirements. Technical Highlights of Model EHY5045TWCE6: EHY5045TWCE6 is a sewage treatment vehicle built on a Dongfeng chassis with a 3308 mm wheelbase. Key technical specifications (based on Chengli’s product database and official announcement parameters) include: • Chassis Model: Dongfeng series; meets China VI emission standards, satisfying Dalian’s environmental requirements. • Engine Power: Approximately 85 kW, delivering ample power and paired with a 5-speed transmission. • Sewage Treatment Capacity: Equipped with a high-efficiency vacuum pump and separation system, achieving an hourly processing capacity of approx. 10–15 m³. • Freeze Protection Design: Water tanks and piping are wrapped with thermal insulation material; critical valves feature electric heating tapes to prevent freezing during winter. • Control System: Integrated electrical control buttons inside the cab enable intuitive, labor-saving operation. The vehicle’s core advantage in low-temperature environments lies in the synergistic operation of its hydraulic system and preheating devices. According to customer feedback, during January 2026—when Dalian’s temperature dropped to -15°C—the vehicle started within just five minutes, and hydraulic system operation remained smooth and responsive, with no issues observe