Government Procurement Case and Bid-Winning Solution Analysis of the Suizhou Dongfeng Yizhan-Style Sewage Treatment Vehicle In municipal environmental protection procurement, sewage treatment vehicles serve as essential equipment for urban sewer network maintenance, river remediation, and emergency response. Their selection directly affects the efficiency of fiscal fund utilization and the vehicle’s long-term operational reliability. In recent years, Suizhou—recognized as “China’s Capital of Special-Purpose Vehicles”—has seen its Dongfeng Yizhan-style sewage treatment vehicles widely adopted in government procurement across multiple regions, thanks to their comprehensive MIIT announcements, strong regulatory compliance, and transparent pricing. This article uses a representative government procurement case as its starting point to conduct an in-depth analysis of the core elements of the winning bid solution, with particular emphasis on the critical aspect of “annual inspection compliance.” I. Case Background: Sewage Treatment Vehicle Procurement Requirements of a Municipal Sanitation Department In 2025, a district-level municipal sanitation department planned to procure a batch of sewage treatment vehicles for cleaning septic tanks in aging residential communities, emergency sewage discharge from rivers, and post-heavy-rainfall sewage pumping operations within its jurisdiction. The procurement budget was capped at approximately RMB 341,000, with requirements that the vehicles be legally registrable, fully compliant for annual inspection, and possess high-efficiency treatment capabilities. Following an open tender process, the bid was awarded to Chengli Special-Purpose Vehicle Co., Ltd. (hereinafter referred to as “Chengli”) for its Dongfeng Yizhan-style sewage treatment vehicle. According to publicly available tender information, the selected solution utilizes a Dongfeng chassis (e.g., model CLW5070GSSD6, as listed on official MIIT announcement platforms) equipped with a wing-type body—facilitating convenient equipment maintenance and rapid operation. The vehicle integrates a vacuum pump, solid-liquid separation unit, and chemical dosing system into a single platform, delivering a daily treatment capacity of approximately 50–80 cubic meters. The procuring entity commented: “We chose Chengli primarily because of its complete MIIT announcements, ensuring seamless vehicle registration, annual inspection, and commercial operation—eliminating potential compliance risks down the line.” II. Why Is “Annual Inspection Compliance” a Non-Negotiable Requirement in Municipal Procurement? In the special-purpose vehicle sector—particularly for non-standard modified vehicles such as sewage treatment units—the MIIT announcement serves as the vehicle’s “ID card” for legal road use and annual inspection. Vehicles lacking an MIIT announcement—or those with incomplete or mismatched announced parameters—cannot be registered, nor can they pass annual inspections—even if their technical performance is outstanding. Leveraging its robust R&D capability and comprehensive MIIT announcement system (e.g., models CLW5070GSSD6, CLW5180GSSD6), Chengli ensures every product meets national emission standards and regulatory announcement requirements. Lessons from non-compliant vehicles are not uncommon. Previously, an environmental maintenance unit in a certain subdistrict purchased a modified sewage vehicle without an MIIT announcement; it was subsequently taken out of service due to failed annual inspection, resulting in rectification costs exceeding tens of thousands of RMB. By contrast, Chengli’s Dongfeng Yizhan-style sewage treatment vehicle employs a Dongfeng chassis meeting China VI emission standards, while its superstructure is fully designed in strict accordance with announced parameters—eliminating compliance risks at the source. III. Bid-Winning Solution Analysis: Core Advantages of the Dongfeng Yizhan-Style Sewage Treatment Vehicle The key