Government Procurement Case of the Dongfeng D6 Blue License Plate Sewage Treatment Vehicle in Qiqihar: In-Depth Interpretation of After-Sales Commitments and Winning Bid Proposal In Northeast China, winter temperatures frequently drop below -30°C, imposing extremely high requirements on cold-weather starting performance and low-temperature hydraulic system stability for sanitation vehicles. In 2024, a municipal sanitation department in Qiqihar (hereinafter referred to as the 'Purchaser') procured a batch of Dongfeng D6 blue license plate sewage treatment vehicles via public tender for urban sewer network cleaning and emergency response. Based on publicly available tender information and feedback from the Purchaser, this case provides a detailed analysis of after-sales clause design in the contract, common dispute avoidance strategies, and how Chengli Special Purpose Vehicles Co., Ltd. (hereinafter referred to as 'Chengli') addresses low-temperature operational challenges through its lifetime after-sales commitment. I. Procurement Background and Core Requirements The Purchaser requires regular cleaning of aging urban sewer networks, demanding vehicles with strong suction capability, efficient solid-liquid separation, and high maneuverability. After comprehensive evaluation, the Purchaser selected the Dongfeng D6 chassis (model CLW5070GSSD6, referencing MIIT announcement parameters), equipped with a blue license plate sewage treatment superstructure. Core requirements include: • Cold-Weather Starting Performance: Ensuring reliable vehicle startup at -35°C ambient temperature, with no freezing of the hydraulic system. • Low-Temperature Hydraulic Stability: Minimal viscosity change of hydraulic oil under low temperatures to ensure smooth suction and discharge operations. • Winter Maintenance Plan: Provision of region-specific maintenance procedures and spare parts inventory tailored for extreme cold climates. With a budget cap of approximately RMB 395,000 (based on local procurement conventions), the Purchaser ultimately signed a procurement contract with Chengli at a unit price of around RMB 320,000 (per publicly disclosed tender information). II. After-Sales Clause Design in the Contract: Focused on 'Low-Temperature Commitments' After-sales clauses are often a high-risk area for disputes in government procurement contracts. This contract specifically strengthens the following provisions: 1. Cold-Weather Starting Performance Guarantee The contract explicitly states: The vehicle must achieve a minimum startup success rate of 98% after being stationary for 12 hours at -35°C ambient temperature. Should failure to start result from issues related to either the superstructure or chassis, the supplier shall provide emergency startup support or equipment replacement within 24 hours. 2. Low-Temperature Hydraulic Stability Commitment The contract stipulates: During continuous operation for two hours within the temperature range of -30°C to -20°C, hydraulic oil temperature must remain no lower than -15°C, and hydraulic components must exhibit no sticking or leakage. The supplier must provide compatibility certification for low-temperature hydraulic oil (e.g., Great Wall L-HS 32). 3. Implementation Details of the Winter Maintenance Plan The supplier shall deliver the 'Winter Maintenance Manual for Northeast China' within 30 days after contract signing, including: • One free on-site inspection per month (covering hydraulic oil, antifreeze, battery, and heating systems); • A full-vehicle freeze-prevention upgrade completed before October each year (e.g., replacing batteries with low-temperature models and installing diesel fuel heaters); • Spare parts inventory: Provision of an emergency kit containing 10 liters each of -35°C-rated antifreeze and low-temperature hydraulic oil, delivered with the vehicle. These clauses directly address the Purchaser’s most critical concerns, effectively preventing the dilemma of 'affordable to buy, but unus