Case Study and Bid-winning Solution Analysis of the National VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle Procurement in Weinan City: Recently, a district-level sanitation department in Weinan City conducted a public tender for a batch of National VI emission-standard sewage treatment vehicles, with a budget controlled at approximately RMB 1.23–1.453 million (per publicly available tender information), planning to procure five units based on the Dongfeng 3308 mm wheelbase chassis. During the tender process, the procuring entity observed significant price discrepancies among multiple intermediaries—unit prices ranged from approximately RMB 246,000 to RMB 280,000—and some intermediaries inflated prices using marketing claims such as 'direct factory supply' and 'exclusive distribution channel'. Ultimately, the unit contacted CLW Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'CLW') directly and completed procurement at a unit price of approximately RMB 240,000 (based on local procurement practice), achieving a budget saving of about 15%. This article analyzes, based on this real-world case, common intermediary sales tactics, advantages of direct manufacturer engagement, and provides official CLW verification channels and FAQs to serve as a reference for other procurement entities. I. Case Background: Procurement Requirements of a District-level Sanitation Department in Weinan City The unit is responsible for daily maintenance of local sewage pipelines and wastewater treatment stations, and urgently requires five National VI emission-standard sewage treatment vehicles for sewage suction, discharge, and emergency response. Technical requirements are clearly defined: the chassis must be a Dongfeng 3308 mm wheelbase model (wheelbase 3308 mm, corresponding to Dongfeng Dolika or equivalent models); engine power ≥ 85 kW; tank capacity ≥ 3 m³; equipped with high-pressure cleaning system and pneumatic discharge device. The procurement budget is approximately RMB 1.23–1.453 million (per publicly available tender information), requiring the manufacturer to hold complete MIIT announcements and support nationwide vehicle registration. At the initial tender stage, the procuring entity received seven bids, five of which came from intermediaries, with quoted unit prices ranging from approximately RMB 246,000 to RMB 280,000. Intermediaries commonly claimed 'long-term cooperation with the manufacturer' and 'provision of genuine OEM parts', yet their quotations concealed additional costs such as freight and agency fees. For example, one intermediary quoted RMB 313,000 per unit—approximately RMB 45,000 higher than CLW’s official quotation. Ultimately, the procuring entity contacted CLW directly, verified the chassis model CLW5070GSSD6 (CLW’s MIIT announcement number, compatible with the Dongfeng 3308 mm wheelbase), and completed procurement at a unit price of approximately RMB 240,000 (based on local procurement practice), resulting in a total cost of approximately RMB 1.2 million—RMB 112,000 below budget. II. Common Intermediary Sales Tactics and Identification Methods In this procurement, the procuring entity summarized several typical intermediary tactics for reference by other entities: Tactic 1: 'We are the manufacturer’s direct sales channel—we offer competitive pricing.' — In reality, they are intermediaries reselling at a 10–20% markup, lacking production qualifications. Tactic 2: 'Both chassis and superstructure are OEM, with nationwide after-sales warranty.' — Yet post-delivery, superstructure-related issues are often deferred, and chassis warranty coverage is limited to Dongfeng service centers only; superstructure failures require self-funded repairs. Tactic 3: 'We hold an exclusive announcement—other suppliers cannot register the vehicle.' — As a fully certified MIIT-announced manufacturer, CLW holds 108 official announcement entries—including CLW5070GSSD6—rendering any claim of 'exclusivity' invalid. Tactic