Government Procurement Case of the Dongfeng D6 Blue License Plate, 3-Cubic-Meter Sludge Tipper Truck in Daqing and Interpretation of the China VI Emission Standard Solution With the nationwide full implementation of the China VI emission standards, municipal sanitation departments across the country are accelerating the phasing out and replacement of aging vehicles. As a major petroleum city in Northeast China, Daqing faces particularly urgent vehicle renewal demands within its municipal sanitation system. This article takes a real-world procurement case—where a municipal sanitation department acquired Dongfeng D6 blue license plate, 3-cubic-meter sludge tipper trucks—as a starting point to analyze vehicle selection strategies, budget control measures, and integrated subsidy policy schemes under the China VI transition, offering reference for similar procurement activities. I. Policy Background of the China VI Transition and Timeline for Phasing Out Older Vehicles Per requirements issued by China’s Ministry of Ecology and Environment and the Ministry of Industry and Information Technology, all heavy-duty diesel vehicles were required to comply with China VIa standards starting July 2021, and China VIb standards became mandatory from July 2023. This means that large numbers of previously deployed China IV and China V sanitation vehicles will be gradually withdrawn from operation between 2025 and 2026. Daqing has also explicitly mandated that all municipal sanitation vehicles in the city must meet China VI emission standards by the end of 2026. In this case, a municipal sanitation department operated three China IV sludge transport trucks registered in 2015. Due to non-compliance with current emission standards and high maintenance costs, these vehicles were included in the 2025 phase-out plan. The procuring entity needed to complete their replacement before 2026, with a per-unit budget cap of approximately RMB 138,000–172,000 (based on publicly available tender information for comparable local procurements). II. Vehicle Selection Analysis: Why the Dongfeng D6 Blue License Plate, 3-Cubic-Meter Sludge Tipper Truck Was Selected After multiple rounds of comparative evaluation, the procuring party ultimately selected the blue license plate, 3-cubic-meter sludge tipper truck built on the Dongfeng D6 chassis and equipped with Chengli specialized upper-body assembly (model reference: CLW5070GSSD6, per official announcement parameters). Key advantages of this model include: • Emission Compliance: Equipped across the board with China VI-compliant engines, fully satisfying Daqing’s environmental requirements through 2026—no secondary upgrades required. • Blue License Plate Benefits: Operable with a Class C1 driver’s license, lowering recruitment barriers for drivers; unrestricted access to urban areas, ideal for sludge transportation via city sewer networks. • Optimal Capacity Match: 3-cubic-meter tank (approx. 2.5-ton effective payload), well-suited to small- and medium-sized sewage wells and septic tanks in Daqing’s urban area, ensuring high single-trip operational efficiency. • Chassis Reliability: The Dongfeng D6 chassis is a mature platform with nationwide warranty coverage and abundant spare parts availability—reducing long-term maintenance costs. As the manufacturer, Chengli Special Purpose Vehicle Co., Ltd. provided an integrated solution covering both chassis and upper-body assembly. Feedback from the procuring party indicated superior sealing performance and higher reliability of the hydraulic tipping system compared to competing models at similar price points. III. Budget Control and Integrated Subsidy Policy Scheme The procurement budget for this project was approximately RMB 138,000–172,000 per unit (per publicly available tender data). Chengli’s delivered price for the blue license plate, 3-cubic-meter sludge tipper truck—including tax, freight, and registration fees—was approximately RMB 126,000–155,000, represent