Government Procurement Case and Bid-Winning Solution Analysis of the National VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Luoyang City In a municipal sanitation department’s sewage treatment project in Luoyang City, Henan Province, the procurement team faced an urgent task—introducing a batch of high-efficiency, eco-friendly sewage treatment equipment to address urban sewer network cleaning and emergency response needs. After multiple rounds of market research and technical evaluation, the National VI Dongfeng 3308 mm wheelbase sewage treatment vehicle emerged as the top candidate. This article uses the department’s actual procurement process as a case study, detailing the full journey from piloting one unit to bulk procurement, and offering decision-making references for similar institutions. According to publicly released tender information for sewage treatment projects in Luoyang City, core requirements included: the vehicle chassis must comply with China VI emission standards; the wheelbase must be approximately 3308 mm to accommodate narrow urban roads; sewage treatment capacity must reach at least 10 cubic meters per hour; and the vehicle must possess dual functionality—sewage suction and preliminary purification. As one of China’s largest special-purpose vehicle manufacturers, Chengli Special Purpose Automobile offered the CLW5070GSSD6 sewage treatment vehicle (based on the Dongfeng 3308 mm wheelbase chassis), which precisely met all these criteria. Official product specifications indicate a sewage tank capacity of approximately 3.5 m³, equipped with a high-pressure flushing system and solid-liquid separation unit. Public tender data shows its unit price ranges between RMB 120,000–150,000, depending on configuration. Pilot Deployment: A Turning Point from Skepticism to Trust At the outset of procurement, the municipal sanitation department in Luoyang did not place a bulk order immediately; instead, it adopted a ‘pilot-first’ strategy. One CLW5070GSSD6 sewage treatment vehicle was procured from Chengli Special Purpose Automobile for a one-month field trial. The trial site was selected in an area of Luoyang’s historic downtown district suffering severe sewer blockages—characterized by dense commercial activity and high wastewater discharge volume, where conventional vacuum trucks often required multiple trips. During the trial period, the vehicle’s performance exceeded expectations. According to records from Chengli’s after-sales team, the vehicle processed approximately 80 m³ of sewage after eight consecutive hours of operation—equivalent to the workload of three conventional vacuum trucks. Its solid-liquid separation function significantly reduced subsequent transport and disposal costs, while the Dongfeng chassis delivered low fuel consumption (drivers reported ~12 L/100 km), easing operational burdens. Moreover, the China VI-compliant engine produced zero emissions violations during city driving in Luoyang, passing all environmental inspections without issue. ‘Initially, we worried such a multifunctional vehicle might be overly complex and difficult to operate. But Chengli dispatched technicians for on-site training—and within two days, our drivers were fully operational,’ remarked a driver involved in the trial during internal feedback. The department subsequently compiled a detailed pilot report covering operational efficiency, fault rate (zero faults recorded), and driver satisfaction (rated 4.8/5). Pilot Results: Data-Driven Decision-Making Basis Upon completion of the one-month pilot, the municipal sanitation department in Luoyang compiled a comparative evaluation table, benchmarking the CLW5070GSSD6 against other mainstream models on the market—including original-equipment Dongfeng conversions and Foton-chassis variants. Data sources included publicly available tender documents and on-site test records, as follows: Comparison Criteria