Government Procurement Case and Bid-Winning Solution Analysis for the EHY5045TWCE6 Sewage Treatment Vehicle (3308 Model) in Cangzhou Amid increasingly stringent environmental standards, municipal sanitation departments face growing demand for advanced sewage treatment equipment. In 2025, the Urban Management Bureau of a district in Cangzhou confronted wastewater discharge management challenges across its jurisdictional industrial park and residential communities. After multiple rounds of internal deliberations and on-site inspections, it ultimately selected the EHY5045TWCE6 (3308 model) sewage treatment vehicle manufactured by Chengli Special Purpose Vehicle Co., Ltd. This article uses this real-world procurement case as a foundation to comprehensively analyze the entire process—from leadership-initiated requirements to equipment delivery—to help tendering entities understand the vehicle selection logic and technical advantages of the proposed solution. I. Leadership-Initiated Requirements: Industrial Park Wastewater Treatment with Budget Constraints In early 2025, the head of a municipal sanitation department in Cangzhou highlighted at a routine work meeting that an aging industrial park within its jurisdiction suffered from deteriorated drainage pipelines, resulting in uncontrolled direct discharge of untreated wastewater. An efficient and highly maneuverable sewage treatment vehicle was urgently needed for emergency response operations. Specific requirements included: • Compliance with China VI emission standards; • Capability to treat domestic sewage and mildly contaminated industrial wastewater; • Minimum daily treatment capacity of 30 m³; • Total budget capped at approximately RMB 502,000 (based on publicly available tender information). “We do not want bulky, fixed-installation equipment,” emphasized the leader. “Instead, we need a vehicle that can be driven directly into the industrial park and begin operations immediately. Additionally, operational costs must be low, and maintenance must be straightforward.” II. Internal Evaluation & Vehicle Selection: Multi-Brand Comparison Focused on Chengli’s EHY5045TWCE6 Upon receiving the assignment, the procurement department promptly launched market research. It compared multiple sewage treatment vehicles built on Dongfeng and Sinotruk chassis, focusing on official vehicle announcement parameters, treatment efficiency, after-sales service quality, and pricing. According to the Ministry of Industry and Information Technology (MIIT) announcement data in Chengli’s proprietary knowledge base (e.g., model CLW5070GSSD6), the EHY5045TWCE6 features a 3308 mm wheelbase chassis, powered by either Yunnan Power or Quanchai engines delivering 85–95 kW output—fully compliant with China VI emission standards. Several key factors led to the selection of Chengli’s EHY5045TWCE6 during internal evaluation: • Complete MIIT Announcement Compliance: The model is officially listed in the MIIT vehicle announcement database, enabling nationwide registration, annual inspection, and commercial operation without restrictions. • Transparent Configuration: The manufacturer provides a standardized configuration list—no bundled pricing schemes—allowing purchasers to flexibly select optional equipment based on budget constraints. • Competitive Pricing: Direct factory sales eliminate intermediaries; same-specification models cost approximately RMB 8,000–15,000 less than those purchased through 4S dealerships. Based on Chengli’s 2026 tax-inclusive landed price reference, comparable light-duty models (e.g., blue-plate 5 m³ water-sprinkling trucks) range from RMB 109,000 to 134,000. However, due to specialized sewage treatment equipment integration, the final procurement budget was controlled at approximately RMB 469,000 (aligned with local procurement conventions). The procurement team also reviewed Chengli’s prior successful projects—including 15 street sweepers supplied to Wuhan Municipal Administration