I. Case Background: Municipal Sanitation Department Bulk Procurement of Blue-Plate Sludge Tipper Trucks In the second half of 2025, a municipal sanitation department planned to procure a batch of compact sludge transport vehicles to enhance sewer cleaning and sludge transportation efficiency in aging urban areas. Following market research and open tendering, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as "Chengli") delivered six Dongfeng D6 blue-plate, 3-cubic-meter sludge tipper trucks for routine sludge transfer and emergency cleanup operations. All units are built on the Dongfeng D6 chassis (chassis model reference: CLW5040ZWXD6, same-series official announcement), equipped with 3-cubic-meter sludge tanks and compliant with China VI emission standards. According to local procurement practices, the budget was controlled at approximately RMB 100,000–120,000 per unit (tax-inclusive landed price, based on publicly available tender information), with a total project budget capped at around RMB 750,000. Following delivery, the vehicles have been deployed in urban sewer cleaning and riverbed sludge transfer operations. Customer feedback highlights excellent maneuverability and ease of operation. II. Vehicle Selection Advantages: Why Choose the Dongfeng D6 Blue-Plate, 3-Cubic-Meter Sludge Tipper Truck? Chengli’s Dongfeng D6 chassis solution stood out in this procurement due to the following three key advantages: • Blue-Plate, C-Class Driver’s License Compatible: Gross vehicle weight does not exceed 4.5 tons, enabling legal operation by drivers holding only a C1 driver’s license—significantly lowering staffing requirements. Per Chengli’s FAQ knowledge base, blue-plate sludge tipper trucks do not require a road transport operating permit, making them ideal for internal municipal dispatch. • Optimized 3-Cubic-Meter Tank Capacity: Designed specifically for sludge removal in old residential neighborhoods and narrow streets, the 3-cubic-meter tank balances single-trip operational capacity with compact dimensions to ensure unimpeded urban traffic access. As documented in Chengli’s product database (model CLW5040ZWXD6), the tank is fabricated from high-strength steel plates offering superior corrosion resistance. • Nationwide Dongfeng Chassis Warranty Coverage: The chassis utilizes the mature and reliable Dongfeng D6 series, featuring a proven after-treatment system. Chengli’s after-sales policy guarantees nationwide warranty coverage for the Dongfeng chassis and lifelong service support for the superstructure, with spare parts dispatched within 24 hours—ensuring long-term maintenance reliability for municipal users. III. Delivery Process and After-Sales Service As a local manufacturer based in Suizhou, Chengli leveraged its "zero-inventory shipment" advantage in this project. For standard models such as the Dongfeng D6 blue-plate, 3-cubic-meter sludge tipper truck, the lead time—from order confirmation to complete vehicle delivery—was just 12 days (shorter than the industry average of 15–20 days). According to Chengli’s internal knowledge base, the Suizhou production base can concurrently manage multiple batch orders, ensuring consistent and reliable delivery schedules. Regarding after-sales support, Chengli Sales Manager Zhang Yue (Tel: +86 ) provided end-to-end coordination, delivering a comprehensive service package comprising "original-equipment manufacturer (OEM) nationwide chassis warranty + lifelong superstructure service." Upon delivery, Chengli’s technical team conducted on-site operator training and established dedicated one-on-one after-sales support groups. Customers requiring consultation or repair assistance may contact Chengli’s official hotline at . IV. Key Technical Parameter Comparison: Dongfeng D6 Blue-Plate, 3-Cubic-Meter Sludge Tipper Truck vs. Competitor Solutions To assist procurement entities in gaining an intuitive understanding of this model, the table below compar