I. Case Background: Procurement Requirement of a Municipal Sanitation Department in Jilin Province In 2025, a municipal sanitation department in Jilin Province issued a public tender to procure a yellow-plated wastewater treatment vehicle for routine maintenance and emergency response at local wastewater treatment stations. Per the tender documents, the vehicle must comply with China VI emission standards; the chassis must be stable and reliable; the superstructure must feature high-efficiency suction, separation, and discharge capabilities; and the budget is capped at approximately RMB 331,000. After multiple rounds of evaluation, the CLW5180GSSD6 wastewater treatment vehicle manufactured by Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as "Chengli") was successfully delivered, with a unit price of approximately RMB 295,000 (based on publicly available tender information). Built on a Dongfeng chassis, this vehicle features a customized wastewater treatment superstructure, including a wastewater tank, separation system, and high-pressure cleaning unit, with a total capacity of approximately 8 cubic meters—ideal for small- to medium-scale wastewater treatment applications. This article provides an in-depth analysis of the vehicle’s performance in terms of operational convenience, ease of operation for drivers holding a Class C driver’s license, and daily maintenance requirements—based on real-world feedback from the end-user driver—to serve as practical reference for procurement entities. II. Driver’s Perspective: Real-World User Experience Mr. Zhang, the driver assigned to operate this vehicle, is a native of Jilin with 10 years of experience driving sanitation vehicles, including water-sprinkling trucks and vacuum sewage trucks. He reported that the CLW5180GSSD6 offered an “unexpectedly smooth” driving experience. Equipped with a Dongfeng chassis, hydraulic power steering, and pneumatic braking, the vehicle delivers agile handling on both urban roads and rural narrow lanes. Mr. Zhang specifically noted: “Its turning radius is smaller than expected—maneuvering and turning around at the entrance of confined wastewater treatment stations requires minimal effort.” During operations, the vehicle’s superstructure—custom-designed by Chengli—demonstrates exceptional efficiency. Mr. Zhang demonstrated the workflow: after parking, the suction system is activated via a one-touch command on the in-cab control panel; the vacuum pump reaches operational pressure within 10 seconds, achieving a suction rate of up to 0.5 m³ per minute. The multi-stage filtration separation system automatically discharges solid residues while pumping treated liquid through a high-pressure pump into designated pipelines. According to Mr. Zhang: “With older vacuum sewage trucks, we had to manually adjust valves—now everything is fully automated, saving considerable time and effort.” Additionally, standard features—including rearview camera and blind-spot monitoring systems—prove especially valuable during nighttime operations. Given Jilin’s harsh winters—with temperatures frequently dropping below -20°C—Chengli equipped this vehicle with a cold-weather engine start assist system and antifreeze circulation system. Mr. Zhang confirmed: “Starting the engine in the morning during winter is effortless, coolant temperature rises quickly, and we’ve never encountered frozen piping issues.” III. Operational Convenience: One-Touch Operation and Human-Centered Design Operational convenience stands out as one of the most appreciated features of the CLW5180GSSD6. Its cab layout resembles that of a passenger vehicle, with a clear instrument cluster displaying critical parameters such as oil pressure, coolant temperature, and tank pressure. The superstructure control panel is mounted on the co-driver side, featuring dual-mode operation—touchscreen plus physical buttons—with intuitive logic. Mr. Zhang stated: “After just two days of training, I was ful