Summary: In early 2025, a municipal sanitation department in Xianyang City, Shaanxi Province, procured a batch of 3308 sewage treatment vehicles (model EHY5045TWCE6) through public tender for emergency response and routine maintenance of urban sewer networks. Based on authentic tender records, this article comprehensively analyzes the project background, vehicle selection process, bidding highlights, and real-world operational feedback—and explores how this successful experience can be replicated across neighboring regions such as Gansu and Ningxia provinces. An FAQ section is included at the end to address common procurement concerns. I. Project Background and Requirements Analysis Xianyang, as a core city in the Guanzhong Plain, has experienced accelerated urbanization in recent years, resulting in prominent aging issues within its old urban drainage infrastructure. By the end of 2024, a municipal sanitation department launched the 'Urban Sewer Emergency Response Capacity Enhancement Project', focusing on procuring highly mobile, high-efficiency sewage treatment vehicles to address sudden incidents such as rain-induced flooding and pipeline blockages. According to the tender documents, key requirements included: Vehicle Specifications: 3308 mm wheelbase chassis; gross vehicle weight not exceeding 4.5 tons—compliant with Blue-Plate Class C driver’s license regulations—to ensure maneuverability within urban environments. Functional Requirements: Capable of sewage suction, solid-liquid separation, preliminary purification, and discharge; minimum single-operation treatment capacity of ≥10 m³/h. Emission Standard: China VI-compliant, meeting the latest environmental protection requirements. Budget Control: Based on publicly available tender information, the budget was capped at approximately RMB 913,000 per unit, with a total procurement quantity of six units. The tender was posted online in December 2024 and attracted participation from multiple suppliers, including Chengli Special Purpose Vehicle Co., Ltd. Ultimately, Chengli secured the contract with its EHY5045TWCE6 model, at an approximate unit price of RMB 128,000 (per local procurement practice), yielding a total contract value of ~RMB 768,000—well below the allocated budget. II. Key Features of the EHY5045TWCE6 Model The EHY5045TWCE6 is a compact sewage treatment vehicle developed by Chengli Special Purpose Vehicle Co., Ltd. based on the Dongfeng 3308 chassis; its official technical parameters are registered in the Ministry of Industry and Information Technology (MIIT) database. Its main features include: Chassis Advantages: Equipped with the Dongfeng 3308 wheelbase chassis and a Quanchai 95-hp engine compliant with China VI emission standards. The chassis benefits from Dongfeng’s nationwide warranty network, enabling users to access authorized service stations anytime, anywhere. Superstructure Configuration: Fitted with a high-capacity vacuum pump, hydraulic system, sewage tank (capacity approx. 3.5 m³), and solid-liquid separation unit. Treated effluent meets municipal discharge standards and can be directly discharged into existing sewer networks. Operational Convenience: Integrated intelligent control system enables one-button activation of full operational sequences, significantly reducing manual labor intensity. Compact overall dimensions allow easy navigation through narrow urban streets. After-Sales Support: Chengli offers lifetime service coverage for the superstructure and guarantees 24-hour direct shipment of spare parts—ensuring long-term, stable equipment operation. During the bidding process, Chengli’s team also presented usage records of identical vehicles previously delivered to other cities in Shaanxi Province (e.g., Baoji and Weinan), demonstrating strong customer satisfaction, low failure rates, and rapid maintenance response times—providing compelling evidence that contributed significantly to their evaluation score. III. Bid Comparison and Reasons for