Government procurement case of the EHY5045TWCE6 sewage treatment vehicle (3308 model) in Shijiazhuang: Annual inspection compliance and winter performance assurance solutions. In northern cities—particularly Shijiazhuang—low winter temperatures pose severe challenges to the operation of special-purpose vehicles. A municipal sanitation department recently procured the EHY5045TWCE6 sewage treatment vehicle (3308 model) for urban drainage network cleaning and temporary sewage treatment. This article provides an in-depth analysis of this procurement case from core dimensions including annual inspection compliance, winter anti-freeze starting performance, low-temperature hydraulic system stability, and maintenance strategies—helping procurement entities understand how to select fully certified, climate-adapted special-purpose vehicles suitable for northern regions. I. Case Background: Procurement Requirements of a Municipal Sanitation Department in Shijiazhuang In the second half of 2025, a municipal sanitation department in Shijiazhuang planned to upgrade a batch of sewage treatment equipment, focusing on resolving issues such as blockages in the old urban drainage system and emergency sewage pumping and discharge. After multiple rounds of market research and tender evaluation, the department ultimately selected the EHY5045TWCE6 sewage treatment vehicle (3308 model) supplied by Chengli Special Purpose Vehicle Co., Ltd. Per local procurement practices, the project budget was approximately RMB 276,000–332,000. The selected vehicle was required to meet China VI emission standards, possess full official certification (i.e., inclusion in the MIIT’s Announcement), support normal registration and annual inspection, and—critically—demonstrate reliable starting and operational stability under low-temperature winter conditions. According to client feedback, Chengli stood out among multiple suppliers due to its complete MIIT certification, transparent configuration specifications, and winter-optimized solutions tailored specifically for northern markets. Currently, this batch of vehicles is already in active service in Shijiazhuang with excellent operational performance. II. Significance of the MIIT Announcement: The Foundation of Annual Inspection Compliance For government procurement, vehicles must be certified under the Ministry of Industry and Information Technology (MIIT)’s “Announcement of Road Motor Vehicle Manufacturers and Products”—a mandatory prerequisite for legal road operation, annual inspection, registration, and commercial operation. Non-compliant vehicles may face registration refusal, annual inspection failure, or even fines and forced suspension of operations. Chengli Special Purpose Vehicle Co., Ltd. maintains 946 certified product entries covering 44 categories; the EHY5045TWCE6 sewage treatment vehicle (3308 model) is included in the MIIT Announcement directory. This means that all critical parameters—including chassis, superstructure, and emissions—have undergone national-level review and approval, ensuring seamless registration procedures at the Shijiazhuang Vehicle Administration Office. According to the knowledge base containing 108 complete announcement parameters, key data for the EHY5045TWCE6—including chassis announcement number, engine model, overall dimensions, and gross vehicle weight—are clearly documented and verifiable. During annual inspection, verification requires only cross-checking against these official parameters—no modifications or supplementary documentation are needed. Key Reminder: Procurement entities should explicitly require suppliers to provide screenshots or official numbers from the MIIT Announcement during tendering, to prevent registration failures caused by announcement discrepancies. All Chengli models support official announcement verification; contact or Zhang Yue at for complete technical parameters. III. Lessons from Non-Compliant Vehicles: Dual Risks