Case Study and Bid-winning Solution Analysis of the Jiaxing 3308 Sewage Treatment Vehicle EHY5045TWCE6 in Government Procurement In a district of Jiaxing, Zhejiang Province, a municipal infrastructure procurement officer faced a challenging issue: outdated sewage treatment equipment operated inefficiently, necessitating urgent replacement with compact sewage treatment vehicles. However, budget constraints, limited site space, and drivers holding only standard Class C driver’s licenses complicated the procurement process. After multiple rounds of solution evaluation, the Chengli EHY5045TWCE6 sewage treatment vehicle was ultimately delivered—emerging as a benchmark case for resolving such challenges. This article uses this case as a starting point to compare operational cost differences between blue-plate (Class C license) and yellow-plate (Class B license) solutions, provide a detailed analysis of the Chengli vehicle’s technical specifications, and offer tailored procurement recommendations for different user groups. Case Background: Procurement Challenges Faced by a Municipal Sanitation Department in Jiaxing A municipal sanitation department in Jiaxing (hereinafter referred to as “the unit”) is responsible for river and domestic sewage treatment within its jurisdiction. Its existing equipment consisted of several aging yellow-plate box trucks, which suffered from low emission compliance, high maintenance costs, and the requirement for Class B licensed drivers—resulting in staffing difficulties. By the end of 2025, the unit planned to procure three compact sewage treatment vehicles, with a total budget capped at approximately RMB 566,000, requiring rapid deployment and compliance with China VI emission standards. Public tender records indicate that Chengli Special Purpose Vehicle Co., Ltd. successfully delivered the EHY5045TWCE6 model. According to feedback from the unit, the vehicles entered service in January 2026 and have since operated stably, significantly enhancing emergency response efficiency. Key advantages of the Chengli solution in this case include: operability with a standard Class C driver’s license—eliminating the need to hire additional Class B drivers; a Dongfeng light-duty truck chassis with nationwide warranty coverage; and lifetime after-sales service for the upper-body assembly, with spare parts shipped directly within 24 hours—marking a clear distinction from conventional yellow-plate alternatives. Blue-Plate (Class C) vs. Yellow-Plate (Class B): In-Depth Operational Cost Comparison To assist procurement entities in making informed decisions, the table below compares typical operational cost differences between the two solutions. Data are compiled from internal knowledge bases and industry norms and are provided for reference only. Comparison Item Blue-Plate (Class C) Solution Yellow-Plate (Class B) Solution Representative Model Chengli EHY5045TWCE6 (blue-plate) Equivalent yellow-plate model (e.g., Dongfeng Duolika D9 chassis) Driver’s License Requirement Class C (standard driver’s license sufficient) Class B (requires specially certified driver) Driver Monthly Salary Approx. RMB 5,000–6,000 (market rate for Class C drivers) Approx. RMB 7,000–9,000 (market rate for Class B drivers) Vehicle Purchase Cost Approx. RMB 280,000–320,000 per unit (per public tender data) Approx. RMB 320,000–380,000 per unit (equivalent yellow-plate model, including upper-body assembly) Annual Inspection Fee Once per year, approx. RMB 500–800 Once per year, approx. RMB 800–1,200 (some provinces require mandatory on-site inspection) Annual Insurance Premium Approx. RMB 4,000–6,000 (lower premium rates for blue-plate vehicles) Approx. RMB 6,000–9,000 (higher premium rates for yellow-plate vehicles) Road Access Restrictions Permitted in urban areas; minimal time-based restrictions Frequent urban restrictions; special permits required Total Estimated 3-Year Operational Cost Approx. RMB 400,000–500,000 (including purchase, labor