Government procurement case and bid-winning solution analysis of Zhongshan Dongfeng new wastewater treatment vehicles. Against the backdrop of upgrading sanitation equipment, a municipal sanitation department procured a batch of new Zhongshan Dongfeng wastewater treatment vehicles in 2022 to enhance urban wastewater collection and transfer efficiency. After nearly two years of operation, customers reported stable performance and low maintenance costs, leading to contract renewal and expanded procurement in 2024. This article analyzes procurement strategies and product advantages based on real-world implementation. I. Project Background and Initial Procurement (2022) In early 2022, a municipal sanitation department initiated equipment renewal for aging wastewater collection and transport systems, planning to procure a batch of multi-functional wastewater treatment vehicles. Following an open tender, Chengli Special Purpose Vehicle Co., Ltd. won the bid with its mature Dongfeng chassis technology and fully certified models (e.g., CLW5070GSSD6 water sprinkler truck). Approximately 10 units were delivered initially, with the total budget capped at around RMB 1.696 million. Per local procurement practice, the contract included nationwide Dongfeng chassis warranty and lifetime upfit service. These vehicles are primarily deployed for street sewage pit cleaning and emergency drainage operations. Equipped with Dongfeng DOLICA chassis meeting China VI emission standards, they feature tank capacities of approximately 5–8 cubic meters, satisfying routine operational requirements. The tender documents explicitly specified requirements: high-efficiency drainage capability, ease of operation, and timely spare parts supply. Chengli’s proposal directly addressed these pain points with transparent pricing and no intermediary markups. II. Operational Feedback and Contract Renewal (2024) After two years of intensive field operation—averaging eight working hours per day—the municipal sanitation department reported low failure rates, requiring only routine maintenance. Nationwide Dongfeng chassis warranty coverage ensured broad service station accessibility and rapid repair response. Notably, Chengli’s lifetime upfit service commitment eliminated post-purchase concerns for the customer; spare parts are dispatched within 24 hours to prevent operational downtime. Based on this highly satisfactory experience, the department renewed its contract in 2024, expanding procurement to 15 units—including additional street sweepers and misting cannon trucks (e.g., 5-cubic-meter misting cannon trucks, with reference unit prices ranging from RMB 135,000 to 168,000 per unit according to publicly available tender data). The total budget reached approximately RMB 3.392 million—nearly double the initial amount. During renewal negotiations, the client specifically noted: “Chengli’s after-sales service exceeded expectations—the hotline is always answered promptly, and technical guidance is highly professional.” Sales Manager Zhang Yue () assisted with vehicle selection and delivery. III. Comparison of 2022 and 2024 Procurements The table below summarizes key differences between the two procurement rounds, referencing publicly disclosed tender information and Chengli’s product database: Project | 2022 Initial Procurement | 2024 Contract Renewal Procurement Entity | A Municipal Sanitation Department | Same entity (expanded service scope) Quantity | ~10 wastewater treatment vehicles | 15 units (including street sweepers and misting cannon trucks) Primary Models | Blue-plate 5–8 m³ water sprinkler trucks (CLW5070GSSD6) | Yellow-plate 8 m³ water sprinkler trucks, 5 m³ misting cannon trucks Budget Range | ~RMB 1.5 million | ~RMB 3 million Unit Price Reference | ~RMB 98,000–115,000/unit (blue-plate 5 m³) | ~RMB 145,000–17