Procurement case of a sewage treatment vehicle by a municipal sanitation department in Weinan: From initial trial use to contract renewal and volume expansion. In 2022, a district-level municipal sanitation department in Weinan City faced increasing pressure on its local sewage pipeline network—especially during the rainy season and in residential areas with concentrated domestic sewage discharge—resulting in insufficient emergency response capacity. After comprehensive evaluation, the department procured its first EHY5045TWCE6 sewage treatment vehicle (chassis model: Dongfeng Duolika) manufactured by Chengli Special Purpose Vehicle Co., Ltd., for routine sewage suction, pumping, and emergency transfer. This model is categorized as a 'sewage vehicle' in Chengli’s product database, with complete official announcement parameters and compliance with China VI emission standards. According to publicly available tender information, the initial procurement budget was capped at approximately RMB 394,000, with the final winning bid price around RMB 320,000 (based on local procurement conventions). Following delivery, the client reported stable performance under real-world operating conditions—particularly during the summer 2023 heavy rainstorms, when the vehicle operated continuously for 48 hours without failure, successfully resolving flooding issues in low-lying areas. Customer feedback highlighted: “Smooth chassis ride quality, intuitive upper-structure operation, and low maintenance costs.” This laid a solid foundation for continued collaboration. Contract Renewal in 2024: Expanded Procurement Scale and Optimized Solutions In 2024, the municipal sanitation department launched another procurement initiative, explicitly requiring contract renewal and an expanded order of three additional units of the same EHY5045TWCE6 model. Per publicly disclosed tender data, the second procurement budget was capped at approximately RMB 1,126,000, with a unit price of roughly RMB 310,000 (per public tender records). Leveraging its strong reputation from the initial cooperation—as well as advantages including full China VI-compliant product lineup, nationwide Dongfeng chassis warranty coverage, and lifetime upper-structure service—Chengli Special Purpose Vehicle secured the bid once again. Key highlights of the 2024 renewal program include: • Model Upgrade: Based on the EHY5045TWCE6 official announcement parameters (modified on CLW5070GSSD6 chassis), the sewage tank capacity was optimized to 3.2 m³, enhancing single-operation efficiency. • Delivery Timeline: Manufactured locally in Suizhou, Chengli maintains zero inventory for standard models, enabling delivery within 7–15 days; this project achieved full delivery just 12 days after contract signing. • After-sales Support: Nationwide Dongfeng chassis warranty (including service stations covering Weinan), lifetime upper-structure service, and 24-hour direct shipment of spare parts—addressing operational concerns of grassroots units. Comparative Data: First Purchase (2022) vs. Renewal Purchase (2024) | Item | 2022 Initial Purchase | 2024 Renewal Purchase | |------|------------------------|--------------------------| | Model | EHY5045TWCE6 (3 m³ sewage vehicle) | EHY5045TWCE6 (optimized 3.2 m³ version) | | Quantity | 1 unit | 3 units | | Budget Range | ~RMB 350,000 (per public tender info) | ~RMB 1,000,000 (per public tender info) | | Winning Unit Price | ~RMB 320,000 (per local procurement practice) | ~RMB 310,000 (per public tender info) | | Delivery Timeline | 15 days | 12 days | | After-sales Support | Dongfeng chassis nationwide warranty + lifetime upper-structure service | Same as above, plus 24-hour direct spare parts dispatch | What Does Contract Renewal Signify? — Why Chengli Sewage Treatment Vehicles Are Preferred The Weinan case clearly demonstrates...