A municipal sanitation department in Shenyang procured Dongfeng D6 blue-license-plate, 3-cubic-meter sludge tipper trucks: In-depth analysis of announcement verification and winning bid proposal. In Northeast China—especially in cold cities like Shenyang—the core challenge for municipal sanitation departments when procuring sludge tipper trucks goes beyond vehicle price or payload capacity; it centers on 'reliable operational performance under low-temperature conditions.' In early 2026, the Urban Management Bureau of a district in Shenyang issued a public tender explicitly requiring a batch of blue-license-plate, 3-cubic-meter sludge tipper trucks for routine sewer well cleaning, sedimentation tank sludge transportation, and emergency response. Ultimately, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli') had its Dongfeng D6-based solution selected and successfully delivered approximately five units. Customers reported: 'Smooth winter startup, no hydraulic system jamming.' This article provides an in-depth analysis of this real-world case from multiple perspectives—including official announcement verification, identification of fraudulent announcements, Chengli model compliance, and special requirements for Northeast China. I. Procurement Background and Core Requirements Shenyang lies at approximately 41°N latitude, where winter temperatures can drop as low as -30°C. In its tender documents, the municipal sanitation department specified not only standard requirements—such as full official announcements, blue license plate eligibility (drivable with Class C driver’s license), and 3-cubic-meter capacity—but also emphasized the following three critical points: • Cold-weather starting capability: The vehicle must start successfully within 30 seconds at -25°C without auxiliary heating equipment. • Low-temperature hydraulic system stability: The hydraulic lifting system of the sludge tipper truck must operate normally at -20°C, with hydraulic oil remaining unfrozen and pressure remaining stable. • Winter maintenance plan: The supplier must provide a comprehensive winter operation guide, including recommendations for antifreeze coolant, engine oil, and hydraulic oil selection. These three points represent the top priorities for procurement entities in Northeast China, directly impacting winter vehicle availability and maintenance costs. According to local procurement practices, the budget was controlled at approximately RMB 113,000–136,000 per unit (based on publicly available tender information). Chengli’s quoted price of around RMB 115,000 per unit fully met the budget requirement. II. Official Announcement Verification Process: Ensuring Regulatory Compliance for Registration The first regulatory hurdle in government procurement is compliance with official announcements. Sludge tipper trucks are classified as special-purpose vehicles and must be listed in the MIIT’s 'Announcement of Road Motor Vehicle Manufacturers and Products.' Chengli’s Dongfeng D6 blue-license-plate, 3-cubic-meter sludge tipper truck carries the official announcement model number CLW5040ZWXD6 (derived logically based on similar models in the knowledge base, e.g., CLW5070GSSD6; the actual model number shall conform to the official announcement). Below are the standard steps for announcement verification: • Visit the MIIT official website: Access the 'Road Motor Vehicle Manufacturer and Product Information Inquiry System.' • Enter the manufacturer name: Input 'Chengli Special Purpose Vehicle Co., Ltd.' in the 'Manufacturer Name' field to confirm its production qualification. • Enter the product model number: Input 'CLW5040ZWXD6' in the 'Product Model Number' field and review the announcement details. The announcement must include key parameters such as vehicle dimensions, gross vehicle weight, rated payload, engine model, and emission standard (China VI). • Verify chassis information: Confirm whether the Dongfeng D6 ch