Procurement Case of a 3308 Yellow-Plated Sewage Treatment Vehicle by a Municipal Sanitation Department in Liuzhou, Guangxi: From 'Middleman Traps' to Direct Factory Supply — In 2025, a municipal sanitation department in Liuzhou, Guangxi (hereinafter referred to as the 'Liuzhou Entity') planned to procure a batch of yellow-plated sewage treatment vehicles to handle high-load operations during the rainy season and sewage treatment under hot-humid environmental conditions. The budget was capped at approximately RMB 341,000, with the target model being a yellow-plated chassis with a 3,308 mm wheelbase. However, during the early bidding stage, the Liuzhou Entity encountered an 'information asymmetry trap' imposed by intermediaries, ultimately avoiding pitfalls by directly engaging the manufacturer—Chengli Special Purpose Vehicle Co., Ltd.—and successfully delivered four units fully compliant with operational requirements under hot-humid conditions. This article uses this case as a starting point and, drawing upon real data from Chengli’s internal knowledge base, provides procurement entities with a 'Middleman Identification-Based' vehicle selection guide. I. Case Background: Procurement Pain Points Under Hot-Humid Conditions Liuzhou is located in Guangxi Province and features a subtropical monsoon climate, with annual rainfall exceeding 1,400 mm and high summer temperatures and humidity. Local sanitation departments face two major challenges during rainy-season operations: (1) prolonged exposure to humid air causes corrosion of chassis and upper structures; and (2) sealing components age more rapidly under hot-humid conditions, leading to reduced sewage treatment efficiency. Consequently, when procuring the 3308 yellow-plated sewage treatment vehicle, the Liuzhou Entity specifically emphasized requirements for anti-corrosion coatings and long-term durability of sealing components under hot-humid conditions. According to publicly available tender information, the Liuzhou Entity initially contacted several local dealers (intermediaries), whose quotations were generally inflated and offered only 'standard configuration' models—without any optimization for hot-humid environments. For instance, one intermediary quoted RMB 336,000 per unit, claiming its vehicle featured a 'universally applicable standard configuration', yet omitted upgraded anti-corrosion coating and weather-resistant sealing treatments. This raised red flags for the Liuzhou Entity, prompting it to shift toward direct factory procurement. II. Common Intermediary Tactics and Identification Methods During procurement, the Liuzhou Entity identified several typical intermediary tactics: Tactic 1: 'Our vehicles use original-factory chassis with identical configurations—and are priced lower.' In reality, intermediaries often cut costs by using low-specification chassis (e.g., non-OEM air conditioning systems or substandard sealing components) but fail to disclose such compromises. Tactic 2: 'We have local inventory and can deliver quickly; ordering from the factory entails long lead times.' However, inventory vehicles may have been stored for months, increasing risks of moisture damage to chassis and sealing components. Tactic 3: 'We offer lifetime warranty coverage—and superior service versus the manufacturer.' Yet intermediaries lack access to genuine OEM parts, making timely repairs difficult to guarantee. Identification Method: The Liuzhou Entity directly contacted Chengli’s official hotline () or sales manager Zhang Yue () to obtain official vehicle specification sheets and announcement parameters (e.g., chassis and body parameters for model CLW5070GSSD6), then conducted item-by-item comparisons against intermediary quotations. For example, Chengli’s official 3308 yellow-plated sewage treatment vehicle comes standard with anti-corrosion coating and weather-resistant sealing components—details entirely absent from intermediary quotation documents.