Amid increasingly stringent environmental regulations, urban wastewater treatment has become one of the top priorities for municipal sanitation departments. In early 2023, the Urban Management Bureau of a district in Wuhu City faced a challenging issue: aging sewer networks along several old streets frequently experienced blockages and overflows due to prolonged disrepair; conventional vacuum trucks and unclogging equipment were no longer sufficient for rapid response. After extensive research, the bureau decided to procure a batch of specialized wastewater treatment vehicles to enhance emergency response efficiency. This article uses this real-world case as a basis to analyze the iterative process—from the shortcomings of the first procurement batch to the upgraded solution. First Procurement Experience: Bottlenecks of the Initial Attempt In March 2023, the Urban Management Bureau of a district in Wuhu City conducted a public tender and procured three compact wastewater treatment vehicles (model specifications referenced similar configurations—not Chengli-branded units). Each unit cost approximately RMB 180,000–220,000 (based on publicly available tender information), primarily intended for routine cleaning of street manholes and emergency pumping operations. However, after six months of actual use, several issues emerged: • Insufficient treatment capacity: Each vehicle’s daily wastewater processing volume was only about 50 m³; during heavy rain or sudden overflows, multiple units had to operate simultaneously—yet overall efficiency remained low. • Poor mobility: The chassis design was undersized with limited payload capacity, resulting in difficult maneuverability under complex road conditions (e.g., narrow alleys, steep gradients), often requiring manual assistance. • High maintenance costs: Critical components—including sewage pumps and filtration systems—experienced frequent failures, and spare parts were not readily available, leading to extended equipment downtime. • Non-compliance with environmental standards: Some units still met only China V emission standards; with intensified local environmental inspections, these vehicles faced imminent phase-out risks. A bureau official remarked: “While the first batch of equipment did alleviate some pressure initially, in the long term they functioned more like ‘emergency toys’—incapable of establishing truly sustainable, routine operational capability.” This lesson directly prompted the bureau to elevate its procurement requirements for the second round in 2024. Identifying Shortcomings and Elevating Requirements Based on operational pain points from the first batch, the Urban Management Bureau of the Wuhu district revised its procurement plan in April 2024, with core requirements including: • Doubled treatment capacity: Each vehicle must achieve a daily processing volume exceeding 100 m³, supporting continuous operation. • Chassis adaptability: Must utilize a China VI-compliant chassis with excellent off-road capability, capable of accessing over 90% of urban roads. • Comprehensive after-sales service: Nationwide chassis warranty required; superstructure components must be covered by lifetime service support, with spare parts guaranteed delivery within 48 hours. • Budget control: Unit price capped at RMB 280,000–350,000 (aligned with local procurement norms), inclusive of installation, commissioning, and operator training. After multiple rounds of evaluation, Chengli Special Purpose Vehicle Co., Ltd.’s 3308 Wastewater Treatment Vehicle EHY5045TWCE6 entered consideration. This model is built upon a Dongfeng chassis, fully compliant with China VI emission standards, and carries complete official certification—enabling nationwide registration and annual inspection. Re-selecting Chengli’s Upgraded Model: Delivery and Configuration of EHY5045TWCE6 In June 2024, the Urban Management Bureau of the Wuhu district formally signed a contract with Chengli to procure two units of the EH