Government procurement case of Dongfeng Yizhan-style sewage treatment vehicle in Jiaxing: A comprehensive driver’s perspective analysis — In spring 2024, a municipal sanitation department (hereinafter referred to as the 'Jiaxing Project') procured a batch of Dongfeng Yizhan-style sewage treatment vehicles for emergency handling of urban sewage pipelines and river remediation. Chengli Special Purpose Vehicle Co., Ltd. was responsible for manufacturing and delivery, supplying a total of 12 units at an approximate unit price of RMB 450,000 (based on publicly available tender information). As a driver directly involved in operating these vehicles, I will provide a detailed analysis—grounded in real-world experience—of the vehicle’s maneuverability, ease of operation for drivers holding a Class C driver’s license, and key daily operational considerations, offering authentic reference material for other procurement entities and operators. I. Real Driver Experience: From 'Reluctant to Drive' to 'Enjoy Driving' When first assigned this task, I felt somewhat anxious—after all, sewage treatment vehicles are special-purpose vehicles, measuring nearly 8 meters in length and weighing close to 7 tons, vastly different from ordinary passenger cars. However, after driving it for just two days, my impression changed completely. 1. Spacious Cab with Minimal Blind Spots The Dongfeng Yizhan-style cab features a cab-over-engine design with a large windshield; its A-pillar blind spot is approximately 15% smaller than that of comparable models. When navigating narrow streets in Jiaxing’s historic urban district, I could clearly see curbs and pedestrians on both sides of the front end—significantly reducing the risk of scraping or collision. Combined with electric side-view mirrors and blind-spot mirrors, near-complete all-around visibility is achieved. 2. Smooth Power Delivery and Effortless Hill Climbing The vehicle is equipped with a Dongfeng OEM engine (model per Dongfeng chassis announcement), delivering a maximum power output of approximately 120 kW and peak torque of 500 N·m. Even when fully loaded with ~8 m³ of sewage, it climbs slopes effortlessly under Jiaxing’s bridge- and incline-heavy road conditions. The transmission features clear shift logic and no noticeable jerkiness. Colleague Lao Li joked: 'It drives smoother than my manual-transmission pickup.' 3. Intuitive Sewage Treatment System Operation The onboard sewage treatment system integrates a vacuum pump, solid-liquid separator, and control panel. The control panel uses Chinese text plus intuitive icons; knobs and buttons are ergonomically laid out, enabling new users to quickly become proficient. During my first hands-on operation, I mastered the full workflow—suction, separation, and discharge—in just 10 minutes, far simpler than anticipated. II. Operational Convenience: Optimized Specifically for Municipal Operations This vehicle’s design thoroughly addresses common pain points encountered during municipal operations. Below are the most notable convenience features I experienced: • Wing-Opening Body Design: The side panels lift upward to form a sunshade canopy, facilitating outdoor filter-bag replacement and equipment maintenance—reducing physical effort by over 50% compared to traditional top-hinged box designs. • Rear-View Camera + Parking Radar: When reversing into narrow sewer access points, the infotainment screen displays real-time rear imagery accompanied by audible distance alerts—eliminating the need to repeatedly exit the vehicle for visual checks. • Hydraulic Stabilizing Legs with One-Touch Leveling: On sloped terrain, pressing the 'Auto-Leveling' button activates all four hydraulic legs, achieving precise leveling within 30 seconds—ensuring stable vehicle posture and enhanced operational accuracy. • Remote Monitoring System: Via a dedicated mobile app, operators can monitor key parameters—including sewage tank level, engine RPM, and vacuum pressure—in real ti