I. Project Background: Originating from the Initial Procurement in 2022 In early 2022, a municipal sanitation department (hereinafter referred to as the 'Procuring Entity') publicly tendered for a batch of 3308-series sewage treatment vehicles to address local sewage treatment challenges. At that time, aging sewer networks and severe rainwater accumulation during monsoon seasons created an urgent need for mobile, high-performance sewage treatment equipment. Following multiple rounds of evaluation, the EHY5045TWCE6 sewage treatment vehicle offered by Chengli Special Purpose Vehicle Co., Ltd. stood out and won the bid at approximately RMB 280,000 per unit (based on publicly available tender information), with an initial delivery of two units. The EHY5045TWCE6 is a specialized sewage treatment vehicle developed by Chengli on the Dongfeng 3308-wheelbase chassis. It carries complete official certifications and is eligible for nationwide registration. According to the MIIT announcement parameters (model CLW5045TWCE6), the vehicle is equipped with a high-performance sewage pump and filtration system, achieving a treatment capacity of up to 30 cubic meters per hour—ideal for emergency drainage and routine sewage treatment in medium- and small-scale areas. The first batch was delivered and commissioned in June 2022, covering three sub-districts under the Procuring Entity’s jurisdiction. Key Facts: Two EHY5045TWCE6 units were delivered under the initial 2022 contract at ~RMB 280,000 per unit, deployed for street-level drainage and sewage removal. Customer feedback highlighted outstanding performance in treatment efficiency, maneuverability, and after-sales response speed. II. Operational Performance: Customer Feedback and Field Data From July 2022 through December 2023, these two sewage treatment vehicles accumulated over 1,500 operating hours and processed approximately 45,000 cubic meters of wastewater. Customer feedback focused on the following aspects: • High Treatment Efficiency: Even during peak monsoon-season demand, the vehicles operated stably; a single operation could clear underground pipelines serving a medium-sized residential community. • Superior Maneuverability: With compact overall dimensions, the vehicles navigate narrow streets effortlessly—offering significant cost and time savings compared to traditional fixed pumping stations. • Reliable After-Sales Support: Chengli provides nationwide Dongfeng chassis warranty coverage and lifelong service for the superstructure. According to records from the Procuring Entity, a pump anomaly occurred in March 2023; Chengli’s after-sales team replaced the required parts within 24 hours, ensuring no disruption to the next day’s emergency flood-control operations. Additionally, Chengli’s assigned sales manager, Ms. Zhang Yue (Tel: ), proactively conducted on-site operator training during the after-sales period, enabling drivers to master equipment operation—further enhancing operational efficiency. These details significantly strengthened the Procuring Entity’s trust in the Chengli brand. III. Contract Renewal and Expanded Procurement: Three Additional Units in 2024 Owing to the excellent performance of the initial units, the Procuring Entity launched another tender in May 2024 to expand its sewage treatment fleet. This time, technical specifications for the EHY5045TWCE6 model were explicitly referenced, with a budget cap of approximately RMB 340,000 per unit (in line with local procurement practices). Chengli secured the contract again and delivered three additional units of the same model, with a total contract value of approximately RMB 900,000. Analysis of Renewal Drivers: • Outstanding Cost-Effectiveness: As a direct manufacturer, Chengli eliminates intermediary markups. Compared to similarly configured vehicles from other brands, each unit saves the customer approximately RMB 12,000–18,000 (per Chengli’s internal knowledge base data).