I. Case Background: Procurement Requirements of a Municipal Sanitation Department in Changsha In July 2025, a municipal sanitation department in Changsha City, Hunan Province, issued a procurement notice for a sewage treatment vehicle, project number CS2025-HW-007. According to the public tender information, the procuring entity required one Dongfeng Yizhan-style sewage treatment vehicle, primarily for emergency sewage treatment and transfer in urban old residential communities, road waterlogging points, and industrial parks. The vehicle must feature self-priming and self-discharging capabilities; its tank must be made of high-quality carbon steel with a capacity of no less than 5 cubic meters; the chassis must comply with China VI emission standards (Dongfeng brand); and a comprehensive after-sales service system must be provided. The project budget was capped at approximately RMB 435,000, with delivery required within 30 days after contract signing. The tender documents explicitly stipulated after-sales terms, including “a minimum 2-year warranty for the complete vehicle” and “nationwide joint warranty coverage for both chassis and upper-structure components.” Ultimately, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as “Chengli”) successfully delivered the vehicle at a unit price of approximately RMB 365,000 (based on publicly available tender information). Customer feedback indicated that the vehicle has already been deployed in multiple emergency operations post-delivery, demonstrating stable performance and prompt after-sales response. II. How to Design After-Sales Clauses in Government Procurement Contracts? In sanitation vehicle procurement, after-sales clauses constitute a core component of the contract, directly impacting the total cost of ownership over the vehicle’s entire lifecycle. Analysis of the contract terms from this Changsha case reveals the following key design principles: • Clear Warranty Period: Contracts typically specify a 2-year or 60,000-kilometer warranty for the complete vehicle (whichever occurs first), with critical components (e.g., engine, transmission) covered under the original chassis manufacturer’s joint warranty program. • Response Time Limits: Suppliers must provide remote technical guidance within 4 hours of receiving a repair request and dispatch qualified technicians to the site within 24 hours. • Spare Parts Supply Commitment: Suppliers must guarantee sufficient inventory of commonly used spare parts, and ensure delivery of critical components (e.g., sewage pumps, valves) to maintenance sites within 48 hours. • Training and Technical Support: Suppliers must provide free operator training covering routine maintenance, fault diagnosis, and troubleshooting procedures. • Breach of Contract Liability: If the supplier fails to respond within the stipulated timeframe or delivers substandard repairs, the procuring party may impose liquidated damages equal to 0.1% of the contract value per day of delay. In this project, Chengli not only met all the above requirements but also offered an additional “Lifetime Upper-Structure Service” commitment—i.e., for upper-structure components (including tank, pump-valve systems, etc.), only the cost of spare parts would be charged beyond the warranty period; labor and repair services would remain fully complimentary. This clause served as a competitive differentiator during bidding and contributed significantly to Chengli’s successful award. III. Common After-Sales Dispute Types and Chengli’s Resolution Strategies During operation, after-sales disputes involving sanitation vehicles mainly fall into the following three categories: Comparison of Common After-Sales Dispute Types and Chengli’s Corresponding Solutions Dispute Type | Industry-Wide Pain Points | Chengli’s Solutions ---|---|--- Ambiguous Responsibility Allocation Between Chassis and Upper Structure | Chassis-related faults are deferred to the OEM; upper-structure faults