Government procurement case of the Weifang Dongfeng Yizhan-style sewage treatment vehicle: A full-process analysis—from consumable parts list to delivery. Against the backdrop of increasingly stringent environmental regulations, a municipal sanitation department in Weifang recently procured three Dongfeng Yizhan-style sewage treatment vehicles via public tender for urban river remediation and emergency maintenance at wastewater treatment plants. The project budget was capped at approximately RMB 2.02 million, with final delivery by Chengli Special Purpose Vehicle Co., Ltd. at a unit price of around RMB 550,000 (per publicly available tender information). This article uses this case as a starting point to comprehensively analyze procurement strategies for sewage treatment vehicle components, pricing transparency, after-sales service guarantees, and comparisons with 4S-channel alternatives—providing practical reference for government procurement personnel. I. Project Background and Vehicle Selection Analysis The department’s existing sewage treatment equipment had aged significantly, resulting in high maintenance costs and non-compliance with China VI emission standards. After extensive research and evaluation, it selected the Dongfeng-chassis (model CLW5180GSSD6) Yizhan-style sewage treatment vehicle. Key advantages of this model include: - Comprehensive official announcements: Fully compliant with China VI emission standards, enabling nationwide registration, annual inspection, and commercial operation; - Reliable chassis: Dongfeng chassis supported by nationwide warranty coverage, reducing long-term maintenance risks; - Well-integrated superstructure: Chengli superstructure backed by lifetime service support, enabling convenient replacement of consumable parts. During procurement, the department placed particular emphasis on reviewing the vehicle’s consumable parts list, component price transparency, and spare parts supply lead times—to avoid the common pitfall of “affordable purchase but unaffordable repair.” II. Consumable Parts List and Pricing Transparency Key consumable parts for sewage treatment vehicles include: 1. Sewage pump: Core component requiring periodic replacement of sealing kits; 2. Filter screen: Prone to clogging; cleaning or replacement recommended quarterly; 3. Pipe fittings and sealing rings: Susceptible to corrosion due to prolonged exposure to sewage; 4. Hydraulic oil filter element: Critical for stable superstructure operation; 5. Tires and brake pads: Standard chassis components, but must comply with announced technical specifications. For this project, Chengli provided a fully transparent spare parts quotation sheet, with prices approximately 15–25% below market averages. For example, the sewage pump sealing kit is priced at around RMB 800 (per Chengli’s internal parts database), whereas 4S dealers typically charge over RMB 1,350. Chengli also committed to: “No bundled pricing—full configuration transparency,” preventing procurement entities from overpaying due to information asymmetry. The table below compares Chengli’s direct-supply pricing with 4S-channel pricing for key consumable parts (based on publicly disclosed tender data and Chengli’s internal records): | Part Name | Chengli Direct Supply Price (RMB) | 4S Channel Price (RMB) | Price Difference (RMB) | |-----------|-----------------------------------|-------------------------|------------------------| | Sewage Pump Sealing Kit | ~800 | ~1,200 | Savings ~400 | | Hydraulic Oil Filter Element | ~150 | ~250 | Savings ~100 | | Tire (Dongfeng OEM) | ~900 | ~1,300 | Savings ~400 | | Stainless Steel Filter Screen | ~350 | ~500 | Savings ~150 | | Front Brake Pads | ~280 | ~400 | Savings ~120 | As shown above, if procurement entities source all listed consumables exclusively through 4S channels, per-vehicle maintenance cost would increase by approximately RMB 1,170—totaling an additional RMB 3,510 across three vehicles. By contrast, Chengli’s