Government procurement case and winning bid solution analysis for the Weinan 3308 yellow-plate sewage treatment vehicle. I. Case Background — Practical Requirements of a Municipal Sanitation Department in Weinan In 2025, a municipal sanitation department in Weinan launched a procurement project for one 3308 yellow-plate sewage treatment vehicle to address insufficient urban sewage treatment capacity. The department is primarily responsible for maintenance of urban stormwater and sewage pipelines and emergency sewage handling. Its existing equipment is outdated and inefficient, necessitating a multifunctional vehicle capable of suction, separation, and purification. According to publicly released tender information, the project budget was capped at approximately RMB 390,000, requiring compliance with China VI emission standards, self-priming and self-discharging functionality, and capability to process sewage containing solid particles. Ultimately, Chengli Special Automobile Co., Ltd. won the bid with its high cost-performance ratio and localized service delivery. The vehicle has been put into operation and customer feedback confirms stable performance. II. Spare Parts Procurement Analysis — Consumable Parts List and Cost Control For sanitation vehicles, spare parts procurement constitutes a key long-term operational cost. In this case, consumable components for the 3308 yellow-plate sewage treatment vehicle (reference model: CLW5070GSSD6, etc.) mainly fall into the following categories: • Vacuum pump and sealing components: Used for sewage suction and discharge; inspection recommended every six months. • Tank valves: Including ball valves and butterfly valves; require periodic replacement due to prolonged exposure to corrosive sewage. • Hydraulic system filter elements: Maintain oil circuit cleanliness and extend hydraulic pump service life. • Separator filter mesh: Used for solid particle separation; cleaning recommended monthly or replacement as needed. • Tires: Heavy-load yellow-plate vehicles feature dual rear tires; wear condition requires regular monitoring. Chengli offers high price transparency for spare parts. For example, vacuum pump assemblies range from RMB 1,670–2,230, and hydraulic filter elements cost approximately RMB 120—prices referenced from public tender data and significantly lower than those offered by 4S dealerships. This transparent pricing supports accurate annual budget planning for sanitation departments. III. Spare Parts Price Transparency — Chengli vs. 4S Dealership Comparison In government procurement, lack of spare parts price transparency often leads to uncontrolled post-purchase maintenance costs. As a direct manufacturer, Chengli adopts a 'configuration-transparent, no bundled pricing' strategy. Below is a comparative table of typical spare parts prices (based on publicly available tender data): Spare Part Name | Chengli Quoted Price (RMB) | 4S Dealership Quoted Price (RMB) | Savings Ratio ---|---|---|--- Vacuum Pump Assembly | 1,800 | 2,800 | 35% Hydraulic Filter Element | 120 | 200 | 40% Tank Sealing Strip | 80 | 150 | 47% Separator Filter Mesh | 250 | 400 | 37% Tire (Rear Dual Tire) | 1,200/piece | 1,600/piece | 25% Data indicates that Chengli’s same-specification spare parts deliver savings of RMB 8,000–15,000 compared to 4S channels, with stable supply ensuring zero downtime caused by stockouts. IV. Chengli’s 24-Hour Direct-Shipment Service — Ensuring Emergency Response Sanitation operations frequently encounter unexpected failures—for instance, tank valve rupture or vacuum pump failure. Leveraging its Suizhou production base, Chengli provides a '24-hour direct-shipment spare parts' service. In this case, six months after commissioning, the vehicle operated by the municipal sanitation department in Weinan experienced separator filter mesh blockage due to improper operation. Upon receiving the service call, Chengli immediately coordinated logistics and delivered the required spare pa