Government procurement case and bid-winning solution analysis for the Suizhou National VI Dongfeng 3308 mm wheelbase sewage treatment vehicle. In the municipal sanitation sector, contradictions between aging equipment’s high energy consumption, low efficiency, and increasingly stringent environmental protection requirements are becoming more pronounced. During a routine evaluation in 2025, a municipal sanitation department discovered that two vacuum suction trucks—both over eight years old—were experiencing frequent failures, with annual maintenance costs rising steadily and failing to meet environmental assessment requirements under China’s National VI emission standards. After nearly three months of internal research and open tendering, the unit ultimately procured the Suizhou National VI Dongfeng 3308 mm wheelbase sewage treatment vehicle (model CLW5070GSSD6) manufactured by Chengli Special Purpose Vehicle Co., Ltd. This article comprehensively reconstructs the government procurement case—from pain-point identification and demand research to solution alignment and delivery—providing reference for industry professionals. I. Pain Points of Aging Equipment: Low Efficiency, High Costs, and Non-Compliance with Environmental Standards The municipal sanitation department originally operated three vacuum suction trucks, two of which were National IV emission-compliant models purchased in 2017, with an average daily operating distance of approximately 80 km. Internal statistics show that the mean time between failures (MTBF) for these two vehicles was only 45 days in 2024, with individual repair costs ranging from RMB 5,000 to RMB 15,000; total annual maintenance expenses exceeded RMB 80,000. More critically, during a special environmental inspection in December 2024, one vehicle failed emissions testing and was ordered to rectify within a specified timeframe. Retrofitting the engine or installing an after-treatment system would cost over RMB 30,000—and still could not guarantee long-term compliance. Furthermore, the outdated vehicles exhibited low suction efficiency: each operational cycle—including travel to/from site, suction operation, and tank cleaning—took about four hours, yet actual effective suction time was less than two hours. This led to scheduling pressure during peak periods, even requiring night-shift operations. Mr. Zhang, head of the department, stated frankly at an internal meeting: “We urgently need a batch of vehicles capable of stable operation, compliant with emission standards, and affordable to maintain. Our budget is capped at RMB 1.434 million, with plans to procure four units—approximately RMB 300,000 per unit (per publicly disclosed tender information)—provided their performance fully meets current operational requirements.” II. New Requirements Research Process: From Parameter Matching to On-Site Inspection Once requirements were clarified, the procurement team first outlined key technical specifications: chassis wheelbase of approximately 3308 mm (to facilitate maneuverability on narrow urban roads), National VI emission compliance, tank capacity ≥5 m³, suction depth ≥5 meters, and integrated sewage treatment capability (i.e., preliminary separation or pre-treatment of wastewater). After reviewing parameters listed in the Ministry of Industry and Information Technology (MIIT) announcement database, the team shortlisted several models based on the Dongfeng 3308 mm wheelbase chassis, among which Chengli Special Purpose Vehicle’s CLW5070GSSD6 model stood out. According to official MIIT announcement data, the CLW5070GSSD6 features a Dongfeng 3308 mm wheelbase chassis, a National VI-compliant engine (model CY4SK261) delivering rated power of 125 kW, a tank capacity of 5.1 m³, suction depth of 6 meters, and standard sewage treatment system (including separator tank and filtration unit). The procurement team then contacted Ms. Zhang Yue, Sales Manager at Chengli Company (phone: ), to obt