Background: First procurement requirement of a newly established unit. In 2025, a municipal sanitation department in Zhangzhou, Fujian Province (hereinafter referred to as 'the unit') procured a sewage treatment vehicle for the first time, driven by upgrades to local wastewater treatment infrastructure. As a newly formed entity, the unit lacked experience in specialized vehicle selection, official announcement parameters, and registration procedures. Per local procurement practices, the budget was capped at approximately RMB 339,000, requiring one sewage treatment vehicle with a 3308 mm wheelbase, model EHY5045TWCE6, designed for high-load operations during rainy seasons and long-term operation in hot, humid environments. The procurement team faced three core challenges: (1) vehicle selection needed to balance regulatory compliance (per official announcements) with real-world operational efficiency; (2) Zhangzhou’s coastal location—characterized by high humidity, frequent rainfall, and elevated temperatures—demanded superior anti-corrosion performance and enhanced durability of sealing components; and (3) post-purchase maintenance required reliable spare parts supply and responsive after-sales service. After extensive research and evaluation, the unit selected Chengli Special Purpose Vehicle Co., Ltd. (hereinafter 'Chengli') as its supplier and procured one EHY5045TWCE6 sewage treatment vehicle. Selection Process: Comprehensive Consultation from Scratch Initially, the unit had limited knowledge regarding chassis specifications, tank material options, and suction capacity requirements for sewage treatment vehicles. Chengli Sales Manager Zhang Yue (Tel: +86 ) assembled a dedicated technical support team to provide end-to-end consultation: • Official Announcement Parameter Interpretation: Chengli detailed the EHY5045TWCE6’s chassis model (e.g., CLW5045TWCE6 series) and emission standard (China VI), based on the Ministry of Industry and Information Technology (MIIT) official announcement, ensuring nationwide registration eligibility and annual inspection compliance. • Adaptation to Hot-Humid Climates: To address Zhangzhou’s high-humidity environment, Chengli recommended applying anti-corrosion coatings to the tank and piping system, and specified corrosion-resistant rubber sealing components to enhance long-term sealing reliability under humid conditions. • Performance During Rainy-Season High-Load Operations: By analyzing local rainy-season operational frequency, Chengli optimized the pump assembly configuration to ensure stable suction performance during continuous, high-intensity operations. During the selection phase, Chengli provided a fully transparent, itemized configuration list—avoiding bundled pricing—and emphasized 'configuration transparency.' Based on publicly available tender information, the landed price (including VAT) for this model was approximately RMB 209,000—about RMB 8,000 lower than comparable market offerings—demonstrating the cost advantage of direct factory supply. Comparative Data: EHY5045TWCE6 vs. Peer Models Parameter | EHY5045TWCE6 (Chengli) | Peer Model A | Peer Model B Wheelbase | 3308 mm | 3308 mm | 3360 mm Tank Material | Carbon Steel + Anti-Corrosion Coating | Standard Carbon Steel | Stainless Steel Sealing Component Type | Corrosion-Resistant Rubber | Standard Rubber | Standard Rubber Emission Standard | China VI | China VI | China VI Landed Price (approx., in ten-thousand RMB) | 18.5 | 20.0 | 22.0 Delivery Lead Time | 10–15 days | 20–30 days | 30–45 days Anti-Corrosion Coating | Standard Equipment | Optional (with surcharge) | Standard Equipment Note: Prices are referenced from publicly disclosed tender data and local procurement practices; actual contract pric