Government Procurement Case and Winning Solution Interpretation for Dongfeng Yizhan-Series Sewage Treatment Vehicle in Beijing I. Case Background: Practical Requirements of a Municipal Sanitation Department in Beijing In Q4 2025, a municipal sanitation department in Beijing publicly tendered for a batch of specialized sewage treatment vehicles. Due to Beijing’s cold winter climate (minimum temperatures reaching -15°C) and complex urban drainage networks, the vehicles were required not only to deliver high-efficiency sewage treatment but also to resolve winter-operation challenges such as freeze-resistant engine starting and low-temperature hydraulic system stability. After multiple evaluation rounds, Chengli Special Purpose Vehicle Co., Ltd. successfully delivered four units of its Dongfeng Yizhan-series sewage treatment vehicles (model reference: CLW5180GSSD6 series) for emergency dredging and sewage treatment tasks in core urban areas. The client commented: “What mattered most to us was the vehicle’s cold-start performance and hydraulic system stability at sub-zero temperatures. Chengli’s vehicles underwent on-site testing and operated normally even at -10°C—this capability proved critical.” Zhang Yue, Sales Manager at Chengli Special Purpose Vehicle Co., Ltd. (Tel: ), stated that for northern markets, Chengli upgraded the Dongfeng chassis with a low-temperature auxiliary starting system and cold-resistant hydraulic tubing to ensure year-round uninterrupted operation. Summary of Core Requirements: • Freeze-Resistant Starting Performance: Engine must start reliably on first attempt at -15°C. • Low-Temperature Hydraulic Stability: Hydraulic oil must remain fluid and maintain pump efficiency under freezing conditions. • High-Efficiency Sewage Treatment: Minimum daily treatment capacity per unit: 200 m³. • After-Sales Service: Timely spare parts supply, especially rapid replacement of winter-prone wear components. II. Equipment Selection & Procurement Process: From Tendering to Delivery This procurement strictly followed China’s government procurement procedures. The client conducted an open tender, comprehensively evaluating suppliers’ qualifications, product specifications, pricing, and after-sales service. Chengli Special Purpose Vehicle Co., Ltd. stood out due to the following advantages: • Complete Regulatory Compliance: All models (e.g., CLW5180GSSD6) are listed in the MIIT Announcement, enabling nationwide registration and annual inspection without modification. • Direct Factory Sales: Elimination of intermediaries results in cost savings of approximately ¥10,000–¥20,000 per unit versus 4S-channel equivalents; final unit price controlled at ~¥280,000–¥350,000 (per public tender data). • Short Delivery Lead Time: Local production in Suizhou enables zero-inventory dispatch; standard models delivered within 7–15 days, meeting urgent client requirements. • Robust After-Sales Support: Dongfeng chassis covered by nationwide warranty; Chengli superstructure backed by lifetime after-sales service; spare parts shipped within 24 hours. Following award of the contract, Chengli’s technical team conducted two on-site coordination sessions with the client to fine-tune hydraulic system parameters per Beijing road conditions and sewage treatment requirements, and installed winter thermal insulation kits. Prior to delivery, each vehicle underwent a 48-hour continuous operational test at Chengli’s factory; final acceptance was confirmed by the client before shipment. III. Wear-Part List and Transparent Pricing As high-frequency-use equipment, sewage treatment vehicles require frequent replacement of wear parts. Chengli provides a detailed wear-part list and fully transparent pricing to prevent hidden post-purchase costs. Below are key wear parts prioritized by this client, along with reference prices (based on local procurement practice): Wear Part Name | Application Location | Reference Unit Price (RMB) | Replacement Inte