Government procurement case of a 3308 yellow-plate sewage treatment vehicle in Ma'anshan: Chengli’s solution versus competitive alternatives. At the end of 2025, a municipal sanitation department in Ma'anshan City publicly tendered for a batch of yellow-plate sewage treatment vehicles to meet local wastewater treatment needs, with a budget capped at approximately XX ten-thousand RMB (per publicly available tender information). Following multiple rounds of evaluation and on-site inspections, Chengli Special Purpose Vehicle Co., Ltd. was selected for its 3308 chassis solution. This article provides an in-depth analysis of the case from perspectives including procurement background, comparative vehicle evaluation, and winter adaptability—offering practical reference for users with similar requirements. I. Procurement Background and Core Requirements Ma'anshan City lies in the lower reaches of the Yangtze River, where winter temperatures can drop to -5°C to -8°C. Additionally, aging municipal pipelines result in high solid content and viscosity in wastewater. The procuring entity explicitly stipulated three core requirements: • Cold-weather starting performance: The vehicle must start and operate normally under low-temperature conditions (-10°C to 0°C), with no risk of hydraulic system freezing. • Low-temperature hydraulic stability: Hydraulic oil must retain good fluidity at low temperatures, ensuring smooth operation of the pumping system without stalling or jamming. • Winter maintenance plan: The supplier must provide a detailed winter maintenance manual covering hydraulic oil replacement intervals, antifreeze selection, and tank heating solutions. Furthermore, the vehicle must comply with China VI emission standards, and possess complete official chassis announcements (e.g., CLW5070GSSD6), ensuring nationwide registration, annual inspection, and commercial operation. II. Chengli Solution vs. Mainstream Market Competitors — Comparative Evaluation In this procurement, Chengli’s 3308-chassis sewage treatment vehicle was benchmarked against a comparable model from another leading market brand (“Competitor A”). Evaluation was conducted across 10 key dimensions (maximum score: 10 points; higher scores indicate superior performance). Evaluation Dimension Chengli 3308 Solution Competitor A Solution Remarks Cold-weather Starting Performance 9.5 8.0 Chengli features standard low-temperature preheating system, enabling reliable startup even at -15°C; Competitor A offers only basic preheating. Low-Temperature Hydraulic Stability 9.0 7.5 Chengli uses specialized low-temperature hydraulic oil (rated down to -30°C); Competitor A employs standard-grade hydraulic oil. Comprehensiveness of Winter Maintenance Plan 9.5 7.0 Chengli provides free winter maintenance manuals and spare parts support; Competitor A charges extra for such services. Completeness of Chassis Announcement Documentation 10.0 9.0 Chengli offers full compliance across all models (e.g., CLW5070GSSD6); some Competitor A models require custom certification. After-sales Service Response Speed 9.0 8.0 Chengli guarantees lifetime upfit service and delivers spare parts within 24 hours; Competitor A’s response time is 48 hours. Price Competitiveness (Within Budget) 9.0 8.5 Chengli’s equivalent configuration costs RMB 8,000–15,000 less than Competitor A (per publicly available tender data). Delivery Lead Time 9.0 7.5 Chengli delivers standard models within 7–15 days; Competitor A requires 20–30 days. Customer Case Breadth 9.5 8.0 Chengli has served over 500 municipal sanitation clients, including Wuhan Municipal Urban Management Bureau (15 sweepers). Configuration Transparency 10.0 7.0 Chengli quotes configurations openly—no bundled packages; Competitor A often conceals accessory costs. Environmental Emission Compliance 10.0 9.5 Both meet China VI standards; Chengli completed full-series transition ahead of schedule.