I. Case Background: Procurement Requirements of a Municipal Sanitation Department in Harbin At the end of 2025, a municipal sanitation department in Harbin planned to procure a batch of blue license plate, 3-cubic-meter sludge dump trucks to cope with the peak winter sludge transportation season, with a budget capped at approximately RMB 202,000. Previously, the unit had used sludge transport trucks from other brands; however, under severe cold conditions of -30°C, frequent issues occurred—including difficult engine starting, hydraulic system jamming, and seal cracking—seriously affecting operational efficiency. This procurement explicitly required the following core performance features: Freeze-Resistant Starting Capability: Normal engine start without auxiliary heating at -35°C. Low-Temperature Hydraulic Stability: Hydraulic oil maintains fluidity under extreme cold, ensuring smooth lifting and unloading operations. Winter Maintenance Program: The manufacturer must provide specialized maintenance guidance and spare parts supply tailored for northern China’s harsh winter conditions. After multiple rounds of research and tendering, the unit ultimately selected a 3-cubic-meter sludge dump truck built on the Dongfeng D6 chassis and modified by Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as “Chengli”). This article analyzes the vehicle selection rationale and freeze-resistance technical highlights from the buyer’s perspective. II. Common Middleman Sales Tactics and Identification Methods In government procurement, intermediaries often exploit information asymmetry to mislead buyers. Below are typical tactics encountered by the buyer in this case, along with corresponding countermeasures: Middleman Statement | Intended Purpose | How the Buyer Should Verify ---|---|--- “We use an original-equipment chassis, but the superstructure is exclusively customized—priced RMB 11,000 lower than 4S dealers.” | Inflates superstructure cost and obscures pricing with vague “customization” claims. | Request itemized quotations separating chassis and superstructure costs; verify official list price for the specified chassis model (e.g., Dongfeng D6 blue license plate). “Cold-weather starting is no problem—we’ve added a preheater, for an extra RMB 5,000.” | Charges for standard equipment as an optional upgrade. | Confirm with the chassis OEM or final vehicle manufacturer: Does the Dongfeng D6 blue license plate chassis include a factory-installed preheating system? Does Chengli’s superstructure already include low-temperature hydraulic oil replacement service? “You can only buy this vehicle through us—Chengli does not sell directly to end users.” | Blocks direct contact between buyer and manufacturer to monopolize profit margins. | Call Chengli’s official hotline at or contact Sales Manager Zhang Yue at to verify whether direct sales policies exist. “In northern regions, an antifreeze circulation system is mandatory—it’s standard equipment; failure to install it will cause breakdowns.” | Creates artificial urgency to push costly aftermarket modifications. | Consult Chengli’s technical department: What is the standard antifreeze solution for this model in Harbin? Is it a standard or optional feature? In this case, the buyer discovered—by contacting Chengli directly—that the intermediary’s quoted price was ~RMB 202,000, whereas Chengli’s direct factory price ranged from RMB 168,000–180,000 (per publicly available tender data), representing a markup of RMB 20,000–30,000. Moreover, the so-called “exclusive customization” claimed by the intermediary was, in fact, a standard production model publicly listed on Chengli’s official website (e.g., CLW5070GSSD6—chassis-based modification), with fully transparent specifications. III. Official Channels for Direct Manufacturer Contact and Verification To bypass intermediaries, buyers should prioritize the following official channels to obtain accurate informatio