I. Case Background: Sewage Treatment Vehicle Procurement Requirement of a Municipal Sanitation Department in Changzhou City In early 2026, a municipal sanitation department in Changzhou City, Jiangsu Province (hereinafter referred to as “the municipal sanitation department”) planned to procure a batch of yellow-plate sewage treatment vehicles due to the upgrade of local sewage treatment facilities, for daily sewage collection, transportation, and emergency response. The procurement requirements specified that vehicles must comply with China VI emission standards and possess complete MIIT (Ministry of Industry and Information Technology) announcements, ensuring normal registration, annual inspection, and operational deployment. Based on local procurement practices, the budget was controlled at approximately RMB 401,000–516,000 per unit, with an intended purchase of two units and a total budget of around RMB 917,000. According to publicly available tender information, multiple special-purpose vehicle manufacturers participated in the bidding process; ultimately, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as “Chengli Special Purpose Vehicle”) won the contract by virtue of its comprehensive MIIT announcements, transparent configurations, and robust after-sales support, delivering two CLW5070GSSD6 yellow-plate sewage treatment vehicles. This case focuses on annual inspection compliance as the core issue, analyzing the critical importance of MIIT announcements, lessons learned from non-compliant vehicles, and how Chengli’s solution ensures smooth annual inspection. II. MIIT Announcement: The ‘Birth Certificate’ for Annual Inspection Compliance In special-purpose vehicle procurement, the MIIT Announcement (i.e., the “Announcement of Road Motor Vehicle Manufacturers and Products”) serves as the statutory basis enabling legal production, sale, registration, and annual inspection of vehicles. Vehicles lacking an MIIT announcement—or possessing incomplete or invalid announcements—are classified as “illegally modified vehicles,” failing annual inspection and potentially subject to seizure. For entities such as municipal sanitation departments operating high-frequency-use vehicles, annual inspection compliance is the primary prerequisite in procurement. All Chengli Special Purpose Vehicle models—including the CLW5070GSSD6 yellow-plate sewage treatment vehicles delivered in this case—possess complete MIIT announcements (e.g., model CLW5070GSSD6). These announcements include key data such as vehicle model, chassis model, engine parameters, emission standard, overall dimensions, and gross vehicle weight rating (GVWR). This means the vehicles have already passed national certification upon factory release; during annual inspection, only copies of the MIIT announcement and the Certificate of Conformity are required to rapidly pass visual inspection, emission testing, and safety checks. According to Chengli’s product database (covering 946 models across 44 categories), Chengli offers full coverage across 44 vehicle types—including water-sprinkling trucks, garbage trucks, street-sweeping trucks, and sewage treatment trucks—with a 100% MIIT announcement completeness rate. This provides municipal sanitation departments with a “zero-risk” procurement option. Lessons from Non-Compliant Vehicles: Real-World Cases of Annual Inspection Failure Cases of annual inspection failure due to MIIT announcement issues are not uncommon in special-purpose vehicle procurement. For example, a sanitation unit in a southern city procured a batch of compact sewage treatment vehicles; however, because the supplier failed to provide complete MIIT announcements, the vehicles were deemed “illegally modified” during annual inspection and failed both visual and emission inspections. Ultimately, the unit incurred additional costs for rectification—including chassis replacement—delaying project progress by approximately three months and incurring extra