Case Study and Bid-winning Solution Analysis of the EHY5045TWCE6 Sewage Treatment Vehicle in Qiqihar’s Government Procurement In Northeast China—particularly in frigid cities like Qiqihar—the selection of municipal sanitation equipment presents unique challenges: cold-weather starting performance, hydraulic system stability, and winter maintenance costs. Recently, a municipal sanitation department completed a batch procurement of sewage treatment vehicles and selected models from Chengli Special Purpose Vehicle Co., Ltd. This case not only highlights Chengli’s strong market presence in Northeast China but also provides a reference template for similar procurement initiatives. This article offers a detailed analysis covering procurement background, equipment performance, bid-winning solution, comparative data, and frequently asked questions. Procurement Background: From Initial Trial to Bulk Collaboration A municipal sanitation department in Qiqihar (hereinafter referred to as “the unit”) had previously purchased water-sprinkling trucks and vacuum suction trucks from Chengli, receiving positive feedback during operation. At the end of 2025, the unit planned to upgrade its fleet of sewage treatment vehicles for urban sewer network maintenance and emergency response. Following an open tender process, Chengli delivered five units of the EHY5045TWCE6 sewage treatment vehicle, with a total procurement value of approximately RMB 1.1 million (based on publicly available tender information), averaging about RMB 220,000 per unit. “Our top priority was Chengli’s cold-weather starting performance,” stated the unit’s director. “In Qiqihar, winter temperatures can drop to -30°C; conventional vehicles often suffer from difficult starts or hydraulic system jamming—but Chengli’s vehicles demonstrated stable performance during testing.” Core Advantages: Freeze-Resistant Starting & Low-Temperature Hydraulic Stability To address the demands of frigid regions, Chengli implemented multiple specialized enhancements on the EHY5045TWCE6: • Freeze-Resistant Starting System: Equipped with cold-weather starting aids—including glow plugs and electrically heated fuel filters—to ensure reliable engine start-up even at -35°C. • Low-Temperature Hydraulic Stability: Utilizes low-temperature hydraulic oil and specially formulated seals to prevent hydraulic fluid solidification or leakage under extreme cold. Official technical specifications indicate that the hydraulic system operates reliably within a temperature range of -40°C to +80°C. • Winter Maintenance Program: Chengli provides a comprehensive winter maintenance manual covering diesel fuel selection (-35 grade diesel), antifreeze replacement intervals (every 2 years or 40,000 km), and battery maintenance recommendations (e.g., use of low-temperature batteries). Real-World Case: During an emergency drill in January 2026, the unit operated these sewage treatment vehicles continuously for four hours at -28°C—with zero failures reported. Operators commented: “The engine started on the first attempt; hydraulic arm movements were smooth and responsive—significantly superior to other brands we’ve used previously.” Bid-Winning Solution Analysis: Transparent Configuration & After-Sales Support Chengli’s bid-winning proposal gained recognition primarily due to its configuration transparency and robust after-sales service commitment. Per the tender requirements, the unit mandated the following capabilities: • Sewage suction and treatment capacity (suction depth ≥ 6 meters; treatment rate ≥ 30 m³/hour) • China VI emission compliance • Chassis covered by nationwide warranty; superstructure covered by lifetime service Chengli’s EHY5045TWCE6 fully met all requirements: built on a Dongfeng chassis and powered by a China VI-compliant diesel engine.