I. Procurement Background and Requirements: Why Annual Inspection Compliance Has Become the Core Criterion In 2025, a municipal sanitation department in Dali Bai Autonomous Prefecture plans to procure a batch of National VI emission-standard sewage treatment vehicles to meet urban sewage pipeline maintenance needs. The procurement plan explicitly specifies the vehicle chassis as the Dongfeng 3308 mm wheelbase model and emphasizes 'complete MIIT announcement compliance and nationwide registration and annual inspection eligibility.' This requirement stems from a prior local procurement lesson: a non-announced vehicle supplied by a vendor—due to nonstandard chassis modification—failed annual inspection and was ultimately rejected, resulting in approximately RMB 300,000 in budget waste (per publicly available tender information). The department head stated: 'As special-purpose vehicles, sewage treatment vehicles must not only fulfill operational requirements but also guarantee hassle-free registration and annual inspection. The MIIT Announcement is a mandatory threshold; vehicles without official announcement approval—no matter how low the price—are unacceptable.' Consequently, this procurement prioritizes suppliers’ capability to provide fully announced models and compliant upfitting. II. MIIT Announcement: The 'ID Card' for Compliant Vehicles Per the MIIT's 'Announcement on Road Motor Vehicle Manufacturers and Products,' all legally roadworthy special-purpose vehicles must be listed in the official Announcement. Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli') maintains 946 product entries covering 44 categories; among them, sewage treatment vehicle models such as CLW5070GSSD6 have obtained National VI emission certification. Key parameters—including overall dimensions, gross vehicle weight, wheelbase (e.g., 3308 mm), engine model, and emission standard—are explicitly specified in the Announcement, ensuring seamless registration, annual inspection, and commercial operation at local traffic management bureaus. Compared with noncompliant vehicles, fully announced models offer the following advantages: • Data Transparency: Announcement parameters match the actual vehicle, preventing discrepancies and disputes; • Nationwide Applicability: Manufactured in Suizhou, shipped directly from zero inventory; standard models delivered within 7–15 days, with Announcement coverage aligned with registration policies across all provinces; • After-Sales Assurance: Dongfeng chassis covered under nationwide warranty; upfitting supported by lifetime service; spare parts dispatched within 24 hours. III. Case Analysis: Winning Solution for the Dali Project For this procurement in Dali Bai Autonomous Prefecture, Chengli’s proposed solution features a National VI Dongfeng 3308 mm wheelbase sewage treatment vehicle, equipped with an original Dongfeng chassis and an upfit comprising a stainless-steel tank and vacuum pump system, with tank capacity approximately 3–4 m³ (per announced model CLW5070GSSD6). Below is a configuration and pricing comparison table (based on publicly available tender data and Chengli’s official quotations): | Item | Chengli Solution (Fully Announced) | Non-Announced Competitor (Reference) | |------|------------------------------------|---------------------------------------| | Chassis Wheelbase | Dongfeng 3308 mm | Dongfeng 3308 mm (unauthorized modification) | | MIIT Announcement Model | CLW5070GSSD6 (National VI) | No announcement or misused model number | | Tank Capacity | Approx. 3–4 m³ | Approx. 3 m³ (overstated) | | Emission Standard | National VI (fully compliant) | National V or uncertified | | Registration & Annual Inspection | Nationwide registration and annual inspection guaranteed | High risk of rejection | | Unit Price (incl. tax, landed cost) | Approx. RMB 95,000–120,000 (reference price for 3 m³ vacuum suction vehicle) | Approx. RMB 85,000 (but high subsequent rectification cos