Government procurement case of Dongfeng double-cab sewer cleaning truck (blue license plate, 3 m³) in Changchun: Winter performance and cost analysis. In Northeast China—especially in high-cold cities like Changchun—municipal sanitation departments face unique challenges in sewer cleaning operations. Low winter temperatures cause hydraulic system sluggishness and difficult engine starts, directly affecting operational efficiency and equipment service life. This article analyzes, from the perspective of a fleet management supervisor, the anti-freeze starting performance, low-temperature hydraulic stability, winter maintenance plan, and comprehensive management costs of a recently procured Dongfeng double-cab sewer cleaning truck (blue license plate, 3 m³) by a municipal sanitation department in Changchun. The vehicle is based on Chengli’s CLW5070GSSD6 official announcement parameters, with a Dongfeng chassis and full compliance with China VI emission standards. According to publicly available tender information, the budget was controlled at approximately RMB 386,000 per unit. I. Fleet Management Supervisor’s Evaluation: Why the Dongfeng Double-Cab Sewer Cleaning Truck Was Selected Mr. Li (a pseudonym), the fleet management supervisor of this department, stated that, during Changchun winters, conventional sewer cleaning trucks often suffer from excessively viscous hydraulic oil, resulting in slow hydraulic pump startup or even ‘no movement when cold-started’. During the model selection phase for this procurement, low-temperature adaptability was a key evaluation criterion for the Dongfeng double-cab sewer cleaning truck (blue license plate, 3 m³). The vehicle is equipped with the original chassis low-temperature starting system, enabling reliable ignition at -30°C. Its hydraulic system employs low-temperature-resistant seals and specialized hydraulic oil, ensuring rapid hydraulic response even under sub-zero conditions. Mr. Li noted: “We previously used other brands; in winter, we had to preheat vehicles for half an hour. With this truck, it’s essentially ‘start-and-go’—greatly enhancing dispatch flexibility.” Following local procurement practices, the department ultimately ordered five units of the Dongfeng double-cab sewer cleaning truck, at a unit price of approximately RMB 105,000 (per publicly available tender data), with the superstructure supplied by Chengli Special Purpose Vehicle Co., Ltd. Mr. Li emphasized that Chengli’s lifetime after-sales policy—lifetime superstructure service and 24-hour direct shipment of spare parts—was one of the decisive factors, especially critical in Northeast China where rapid spare-part availability during winter is essential. II. Dispatch Flexibility: Addressing Changchun’s Complex Road Conditions and Emergency Tasks Changchun’s urban roads are narrow, and many neighborhoods are old—making access difficult for conventional large-scale sewer cleaning trucks. The Dongfeng double-cab sewer cleaning truck features a blue license plate design (drivable with a Class C1 driver’s license), compact body dimensions, and a small turning radius, enabling agile maneuvering through back alleys and narrow streets. Equipped with a double-cab configuration, it accommodates up to five personnel, facilitating on-board deployment of operation crews and reducing staff commuting time. During post-blizzard operations, sewer cleaning trucks frequently coordinate with street sweepers; this vehicle’s rapid response capability—averaging only 15 minutes from startup to site arrival—significantly improves overall dispatch efficiency. A dispatcher from the department reported: “In the past, when sudden pipe blockages occurred, large vehicles couldn’t enter affected areas, forcing manual intervention with very low efficiency. Now, using this truck, the average time from task assignment to completion of cleaning has been reduced by over 40%.” III. Fuel Consumption Monitoring Data: Actual Operational Cost Anal