Government Procurement Case and Bid-Winning Solution Analysis for the Dongfeng Double-Cab Sewer Cleaning Truck (Blue License Plate, 3-cubic-meter Capacity) in Shijiazhuang. In Shijiazhuang, municipal sanitation departments are experiencing increasing demand for specialized vehicles such as sewer cleaning trucks—especially the blue-plate, 3-cubic-meter Dongfeng double-cab model—owing to its maneuverability and suitability for urban drainage network maintenance. Based on a real-world procurement case, this article provides a detailed comparative analysis of technical specifications, procurement considerations, and vehicle selection recommendations across five mainstream models, offering objective reference for government procurement. Shijiazhuang is located in North China, where winter temperatures are low; therefore, sewer cleaning operations frequently face challenges including cold-weather engine starting and hydraulic system stability at low temperatures. Accordingly, this procurement prioritized vehicle performance under low-temperature conditions, conducting an in-depth comparison based on product data provided by Chengli Special-Purpose Vehicles (Service Hotline: ; Sales Manager Zhang Yue: ). Comparative Technical Specifications Table for Five Mainstream Models Below are five blue-plate, 3-cubic-meter Dongfeng double-cab sewer cleaning truck models recently evaluated by a municipal sanitation department in Shijiazhuang. Data sources include Chengli Special-Purpose Vehicles’ official MIIT announcement parameters and field application feedback. Model | Chassis Brand | Engine Power (kW) | Tank Capacity (m³) | Gross Vehicle Weight (kg) | Emission Standard | Cold-Weather Starting Configuration | Hydraulic System Features | Approximate Unit Price (RMB) CLW5070GSSD6 | Dongfeng | 85 | 3.0 | 7360 | China VI | Standard preheater | Low-temperature hydraulic oil | ~¥98,000–¥115,000 CLW5070GYQD6 | Dongfeng | 85 | 3.0 | 7360 | China VI | Optional electric heating | Low-temperature-resistant sealing components | ~¥102,000–¥120,000 CLW5070ZYSK6 | Dongfeng | 85 | 3.0 | 7360 | China VI | Standard preheater + electric heating | Hydraulic oil temperature stabilization system | ~¥110,000–¥128,000 CLW5070GQX6 | Dongfeng | 85 | 3.0 | 7360 | China VI | Optional preheater | Standard hydraulic oil | ~¥95,000–¥110,000 CLW5070TDYD6 | Dongfeng | 85 | 3.0 | 7360 | China VI | Standard preheater + hot-air system | Upgraded low-temperature hydraulic oil & sealing components | ~¥115,000–¥135,000 Note: Above data references Chengli Special-Purpose Vehicles’ product database and official MIIT announcement parameters (e.g., CLW5070GSSD6); price ranges are estimated according to local procurement practices. Comparative Analysis Across Key Dimensions 1. Cold-Weather Starting Performance Winter temperatures in Shijiazhuang often fall below –10°C; thus, cold-weather engine starting capability is a critical performance indicator. As shown in the comparison table, models CLW5070ZYSK6 and CLW5070TDYD6 feature standard preheaters plus electric heating/hot-air systems, significantly enhancing engine start reliability under low-temperature conditions. Although CLW5070GSSD6 includes a standard preheater, it lacks auxiliary electric heating and may exhibit slightly reduced starting performance under extreme cold. Feedback from a local street environmental maintenance unit indicates that CLW5070TDYD6 achieves successful single-start operation even at –15°C, demonstrating clear superiority. 2. Low-Temperature Hydraulic System Stability The hydraulic system of sewer cleaning trucks must maintain adequate fluidity at low temperatures to prevent oil solidification and consequent operational failure.