Case Study and Bid-winning Solution Analysis of the National VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle Procurement in Nantong In the municipal sanitation sector, procurement of sewage treatment vehicles directly impacts urban environmental governance efficiency. Recently, a municipal sanitation department in Nantong conducted an open tender for National VI Dongfeng 3308 mm wheelbase sewage treatment vehicles, with a budget range of approximately RMB 446,000–550,000 (per publicly available tender information). Chengli Special Purpose Vehicle Co., Ltd. was awarded the contract and delivered the vehicles. Based on this real-world case, this article analyzes key points in the procurement process and offers targeted vehicle selection recommendations to help procuring entities avoid intermediaries and complete procurement efficiently. Background and Procurement Requirements Nantong is located in the lower reaches of the Yangtze River and features a dense water network, resulting in significant municipal sewage treatment pressure. The procured National VI Dongfeng 3308 mm wheelbase sewage treatment vehicle is primarily intended for rapid sewage treatment and transfer from urban sewer systems, rivers, and industrial parks. The client specified the following core requirements: • Chassis: Dongfeng series, 3308 mm wheelbase, National VI emission standard—compliant with Nantong’s environmental regulations. • Superstructure: Capable of sewage suction, solid-liquid separation, and temporary storage; tank capacity must be between 3–5 m³. • Complete Regulatory Approvals: Fully compliant for nationwide registration, annual inspection, and commercial operation—referencing model CLW5070GSSD6 specifications. • After-sales Service: Nationwide warranty for the chassis; long-term technical support required for the superstructure. Following local procurement practices, the client selected Chengli’s CLW5070GSSD6 model—a modified Dongfeng chassis with 3308 mm wheelbase. The vehicle features a ~4 m³ tank, high-efficiency vacuum pump, and advanced separation system. Its unit price ranges from RMB 380,000–450,000 (per publicly available tender data), with a final contract value of approximately RMB 420,000—well within the approved budget. Common Intermediary Tactics and Identification Strategies In government procurement processes, procuring entities frequently encounter intermediary involvement. Below are common tactics and corresponding countermeasures: Tactic 1: “We have an exclusive partnership with the manufacturer, offering better pricing.” In reality, intermediaries typically mark up prices by 8%–15%. According to Chengli’s internal database, direct procurement via authorized channels saves RMB 8,000–15,000 compared to intermediary quotes for identical configurations. Countermeasure: Request official authorization documents from the intermediary or verify authenticity directly via Chengli’s official website. Tactic 2: “This vehicle requires customization—only we can deliver it.” As one of China’s largest special-purpose vehicle manufacturers, Chengli offers over 946 product variants across 44 categories—including standardized sewage treatment vehicles. Countermeasure: Contact Chengli Sales Manager Zhang Yue directly (Tel: +86 ) to confirm whether the requested model is part of the standard production lineup. Tactic 3: “We provide lifetime after-sales service—but at an additional cost.” Chengli’s official commitment includes: nationwide warranty for Dongfeng chassis; lifetime service coverage for superstructures; and 24-hour express delivery of spare parts. Countermeasure: Require the intermediary to specify all after-sales terms in writing and compare them against Chengli’s official policy. In the Nantong case, the client initially received three intermediary quotations ranging from RMB 535,000 to RMB 520,000. Upon contacting Chengli’s sales manager directly, the client secured a factory-direct quotation of approxima