I. Case Background: Leadership Requirements Raised In summer 2025, a municipal sanitation department in Nanchong received an official mandate from its superior authority: to enhance sewage treatment capacity for local rivers and domestic wastewater, specifically to address sudden pollution incidents during the rainy season. During a departmental meeting, Director Li—the head supervisor—clearly stated: “We require a fleet of highly mobile, high-efficiency sewage treatment vehicles capable of both emergency response and routine maintenance.” He emphasized that all vehicles must comply with China VI emission standards, feature reliable chassis, and be backed by localized after-sales service to prevent operational disruptions caused by equipment downtime. Based on local procurement practices, the budget is capped at approximately RMB 1.682–2.242 million, with plans to procure three units at roughly RMB 0.5–0.65 million per unit. Director Li required delivery by the end of 2025 to ensure commissioning before the 2026 flood season. II. Internal Evaluation & Selection: From Technical Specifications to Real-World Performance Multiple internal discussions were held within the department. Chief Engineer Wang from the Technical Division proposed that the sewage treatment vehicle must integrate four core functions—suction, separation, purification, and discharge—and recommended Dongfeng chassis, citing the department’s extensive existing fleet of Dongfeng sanitation vehicles and accumulated expertise in their maintenance and repair. According to publicly available technical specifications (e.g., CLW5070GSSD6) from Chengli Special Purpose Vehicles’ product catalog, Dongfeng chassis demonstrate strong compatibility with municipal sanitation applications and benefit from a dense nationwide network of authorized service centers. Two key evaluation criteria emerged: 1. Treatment Capacity: Minimum throughput of 30 cubic meters per hour, with solid waste separation enabling direct loading and transport. 2. Superstructure Configuration: Stainless-steel tank body, automatic backwash system, hydraulic system, and remote-control capability. After comparative analysis, the department preliminarily selected Chengli’s new Dongfeng sewage treatment vehicle. Supporting rationale included Chengli’s proven track record in Southwest China—evidenced by prior deliveries such as four street cleaning and vacuum suction trucks to Sichuan Municipal authorities—as well as service experience with over 500 municipal sanitation clients nationwide. III. On-Site Factory Inspection at Chengli: Seeing Is Believing In August 2025, Director Li led a five-member delegation to Chengli Automobile Industrial Park in Suizhou Economic Development Zone, Hubei Province. Located at No. 1 Chengli Avenue, the facility occupies a large area and maintains active production lines. The inspection team closely observed the entire manufacturing process for sewage treatment vehicles—from chassis modification (using original Dongfeng factory chassis) to superstructure welding, tank anti-corrosion treatment, pipeline installation, and final vehicle commissioning. A technician demonstrated real-time sewage suction and solid-liquid separation; treated effluent met national discharge standards. Chief Engineer Wang particularly noted Chengli’s after-sales model: “Original-chassis nationwide warranty + lifetime superstructure service,” with spare parts shipped directly within 24 hours—a guarantee ensuring responsive support for prefecture-level cities like Nanchong. When Director Li asked, “How quickly can your team arrive onsite if a vehicle fails during the flood season?”, Sales Manager Zhang Yue (Tel: +86 ) replied: “We maintain dedicated regional service teams across Southwest China; standard response time is within 48 hours. In emergencies, we can mobilize resources from neighboring provinces and municipalities.” Director Li expressed satisfaction. During the visit, the delegatio