Case Study and Bid-winning Solution Analysis of the Dongfeng D6 Blue-Plate Sewage Treatment Vehicle Procurement by Government in Hohhot In Hohhot, Inner Mongolia, winter temperatures frequently drop below -20°C, imposing stringent requirements on municipal sanitation vehicles’ cold-start performance and hydraulic system stability. A municipal sanitation department recently launched a public tender for a batch of blue-plate sewage treatment vehicles for urban sewer network maintenance and emergency response. This article provides an in-depth analysis—based on an actual procurement case—of cost differences between fuel-powered and fully electric versions, comparative application scenarios, and how Chengli Special Purpose Vehicle Co., Ltd. addresses winter challenges in Hohhot. Project Background and Requirements Analysis The procuring entity is the Urban Management Bureau of a district in Hohhot, planning to purchase five blue-plate sewage treatment vehicles, with a budget capped at approximately RMB 513,000 (per publicly available tender information). Key requirements include: the vehicle must possess sewage suction, transfer, and preliminary treatment capabilities; the chassis must operate reliably in low-temperature environments; the upper-body assembly must ensure stable hydraulic system operation under sub-zero conditions; and the vehicle must comply with China VI emission standards and be eligible for registration and annual inspection. After multiple rounds of evaluation, Chengli Special Purpose Vehicle Co., Ltd.’s Dongfeng D6 chassis solution stood out. A responsible official from the bureau stated: “We previously used vehicles from other brands, but winter starting difficulties and hydraulic oil solidification were common issues. This time, we prioritized anti-freeze design and after-sales service responsiveness.” Chengli’s proposal included standard cold-start assistance systems and low-temperature-resistant hydraulic oil—precisely aligned with local operational needs. Fuel-Powered vs. Fully Electric: Cost and Applicability Comparison Amid national promotion of new-energy vehicles, the procuring entity also considered fully electric sewage treatment vehicles. However, charging infrastructure remains insufficiently deployed along municipal sanitation routes in Hohhot, and electric vehicles suffer severe range degradation under extreme cold. Below is a comparative cost analysis between the fuel-powered version (Chengli Dongfeng D6) and a hypothetical equivalent-specification electric version: Comparison Item Fuel-Powered Version (Dongfeng D6 CLW5070GSSD6 Chassis) Electric Version (Assumed Equivalent Specification) Procurement Unit Price (per publicly available tender data) Approx. RMB 98,000–115,000/unit Approx. RMB 180,000–220,000/unit (including battery) Annual Operating Cost (fuel/electricity + maintenance) Approx. RMB 25,000/unit (diesel) Approx. RMB 12,000/unit (electricity), but requires investment in charging infrastructure Winter Range/Start-up Standard cold-start system enables normal start-up down to -30°C Range reduction of 30%–50% in low temperatures; frequent recharging required Charging Infrastructure Requirement No additional infrastructure needed; refueling available at standard gas stations Requires dedicated or cooperative charging stations; upfront investment ~RMB 50,000 Hydraulic System Stability Low-temperature-resistant hydraulic oil ensures normal viscosity at -20°C Electric hydraulic pump performance affected by battery low-temperature limitations; slower startup response After-Sales Service (Chassis + Upper Body) Nationwide Dongfeng chassis warranty; lifetime service for Chengli upper body Battery warranty: 8 years or 150,000 km; upper-body warranty period comparatively shorter Registration & Annual Inspection Complete official announcements; nationwide registration eligibility (China VI compliant) Subsidy restrictions for electric municipal vehicles apply in certain regions As shown in t