Interpretation of the Government Procurement Case and Winning Bid Solution for the New Dongfeng Wastewater Treatment Vehicle in Daqing — In Q3 2025, a northeastern city (hereinafter referred to as 'Daqing') completed a centralized procurement of wastewater treatment vehicles through a framework agreement procurement model. This procurement focused on new-model wastewater treatment vehicles built on Dongfeng chassis, with a budget capped at approximately RMB 395,000 per unit. Chengli Special Purpose Vehicle Co., Ltd. ultimately delivered six units. Based on publicly available tender information, this article outlines the framework agreement background, supplier shortlisting process, order-triggering mechanism, and Chengli’s competitive advantages, offering reference for similar procurements. I. Background of Framework Agreement Procurement As a major industrial city in Northeast China, Daqing faces mounting pressure in municipal pipeline maintenance and wastewater treatment. At the end of 2024, the city’s municipal sanitation department launched the 'Sanitation Vehicle Framework Agreement Procurement Project', covering multiple vehicle types including water-sprinkling trucks, sewage suction trucks, and wastewater treatment vehicles. According to local procurement practice, the framework agreement has a two-year validity period, aiming to determine a qualified supplier list via a single tender, followed by demand-driven purchase orders. Tender documents indicate a total project budget of approximately RMB 9.018 million, with wastewater treatment vehicles accounting for about 35% of the allocation. Key requirements include: Dongfeng’s latest-generation chassis (China VI emission standard), tank capacity of no less than 6 cubic meters, and integrated automatic suction/drainage and solid-liquid separation systems. A total of seven enterprises participated in this framework agreement tender, including Chengli Special Purpose Vehicle Co., Ltd. Four suppliers were ultimately shortlisted. Chengli secured inclusion in the supplier list thanks to its comprehensive product documentation (e.g., model CLW5070GSSD6), localized service capability (manufacturing base in Suizhou with nationwide warranty coverage), and extensive supply experience across Northeast China. Public tender information indicates that Chengli received high scores in the technical evaluation, particularly excelling in 'after-sales response speed' and 'spare parts supply assurance'. II. Shortlisting Process and Technical Requirements The framework agreement shortlisting evaluation consisted of two stages: 'Qualification Pre-screening' and 'Technical & Commercial Evaluation'. During qualification pre-screening, all bidders were required to submit supporting documents such as business licenses, MIIT-approved technical parameters, and records of similar projects completed over the past three years. Chengli submitted five cold-climate-adapted models selected from its database of 946 products; among them, Dongfeng-chassis models were highlighted due to their superior low-temperature performance and ease of maintenance. During the technical and commercial evaluation stage, the review panel focused on the following criteria: • Chassis Adaptability: Dongfeng chassis enjoys high market penetration in Northeast China, ensuring ready availability of spare parts and featuring proven cold-start systems. • Superstructure Configuration: Wastewater treatment vehicles must integrate vacuum pumps, wastewater separation tanks, and high-pressure cleaning equipment. Chengli’s solution features stainless-steel tanks (thickness ≥ 4 mm) with corrosion resistance rating C4. • Emission Standards: All units comply fully with China VI standards, meeting Daqing’s environmental requirements. • After-sales Service: Chengli commits to 'nationwide Dongfeng-chassis warranty' and 'lifetime superstructure service', plus 24-hour direct spare parts delivery to Daqing. Ultimately, Chengli achieved a techn