Government procurement case of Dongfeng Yizhan-style sewage treatment vehicles in Jilin: In-depth comparison between blue-plate (C-license) and yellow-plate (B-license) models. In early 2026, a municipal sanitation department in Jilin City planned to procure a batch of Dongfeng Yizhan-style sewage treatment vehicles for urban sewer network maintenance. After multiple rounds of bidding and on-site inspections, Chengli Special Purpose Vehicle Co., Ltd. was selected. This case analyzes operational cost differences between blue-plate (C-license) and yellow-plate (B-license) models and interprets the core parameters of Chengli’s blue-plate solution, providing reference for similar procurement projects. Case Background and Requirements Analysis The department is primarily responsible for sewage well cleaning, pipeline unclogging, and emergency drainage tasks across surrounding areas of Jilin City. Project requirements specify high vehicle maneuverability, low operating costs, and adaptability to narrow urban streets. Based on local procurement practices, the budget per unit is capped at approximately RMB 276,000. The tender documents explicitly require: compliance with China VI emission standards; reliable chassis; fully functional superstructure; and nationwide registration and annual inspection eligibility. During initial screening, the procuring entity compared two options—blue-plate (drivable with C-license) and yellow-plate (drivable with B-license) models. Blue-plate vehicles were prioritized due to their lower driving qualification threshold and superior road access rights. Blue-Plate (C-License) vs. Yellow-Plate (B-License): Operational Cost Comparison To support intuitive decision-making by the procuring entity, we compiled the following comparative table based on Chengli’s product database and MIIT announcement parameters. All data derive from actual tender information and Chengli model specifications (e.g., model CLW5070GSSD6). Comparison Item Blue-Plate (C-License) Solution (e.g., Chengli CLW5070GSSD6) Yellow-Plate (B-License) Solution (Typical Yellow-Plate Models) Driving Qualification C1/C2 driver’s license sufficient; no additional training required B2 or higher driver’s license required; higher driving test costs Gross Vehicle Weight ≤4.5 tons (compliant with blue-plate standard) Typically 8–12 tons, suitable for heavier payloads Purchase Cost (Based on Public Tender Data) Approx. RMB 98,000–150,000 per unit (e.g., 5-cubic-meter water sprinkler) Approx. RMB 145,000–245,000 per unit (e.g., 8–12 cubic-meter models) Road Access Restrictions Unrestricted in most urban districts; ideal for city operations Restricted in some city centers; permits required Annual Operating Costs Lower insurance and vehicle & vessel tax; fuel consumption approx. 8–12 L/100 km Higher insurance premiums; fuel consumption approx. 15–20 L/100 km Registration & Inspection Process Blue-plate registration permitted nationwide; annual inspection straightforward Yellow-plate registration often requires affiliation or commercial operation permit; stricter annual inspection Applicable Scenarios Narrow urban streets, residential communities, industrial parks Suburban areas, construction sites, large-scale pipeline maintenance As shown above, blue-plate vehicles demonstrate significant advantages in driving qualification requirements, purchase cost, and road access rights. Taking Chengli’s CLW5070GSSD6 as an example—the blue-plate representative of the Dongfeng Yizhan-style sewage treatment vehicle—it maintains gross vehicle weight under 4.5 tons, fully satisfying C-license driving requirements and passing MIIT certification to ensure nationwide registration eligibility. Core Parameter Interpretation of Chengli’s Blue-Plate Solution In this Jilin case, the procuring entity ultimately selected Chengli’s blue-plate solution, specifically model CLW5070GSSD6 (Dongfeng Yizhan chassis). Per MIIT announcement parameters: – Chassis: