I. Case Background: Procurement Record of Zhongshan Dongfeng D6 Blue-Plate Sewage Treatment Vehicle In 2025, a municipal sanitation department in a certain region publicly tendered for a blue-plate sewage treatment vehicle to address the needs of septic tank cleaning in old residential communities and small river remediation within its jurisdiction. According to local procurement practices, the budget was capped at approximately RMB 397,000. After multiple rounds of evaluation, Chengli Special Purpose Vehicle Co., Ltd. delivered one Dongfeng D6-chassis sewage treatment vehicle, model CLW5070GSSD6, at a unit price of approximately RMB 325,000 (per publicly available tender information). The vehicle is built on a Dongfeng D6 chassis with a single-row cab, wheelbase of 3,308 mm, powered by a Quanchai 115-horsepower engine meeting China VI emission standards, and overall dimensions of 5,995 × 2,090 × 2,650 mm. Its upper structure includes: a suction tank with a capacity of approximately 3.5 m³; a sewage separation system capable of processing 10–15 m³/h; and an integrated high-pressure cleaning pump (rated pressure: 20 MPa) with self-priming functionality. Customer feedback indicates that during continuous operation testing, the vehicle processes approximately 3 tons of sewage per cycle, and the moisture content of separated solid waste remains below 30%, fully satisfying routine operational requirements. Notably, during procurement, the department received quotations from several intermediaries—all 14,000–20,000 RMB higher than Chengli’s direct-sale price. This phenomenon is not isolated but rather common in government procurement. Below, we analyze typical intermediary sales tactics and provide verified channels for direct manufacturer engagement. II. Common Intermediary Tactics and Identification Guidelines In tender procurement, intermediaries often exploit information asymmetry to inflate prices or mislead buyers on vehicle selection. Below are three typical tactics and corresponding countermeasures: Tactic 1: “We have a strategic partnership with the manufacturer—our pricing is more competitive.” Reality: As one of China’s largest special-purpose vehicle manufacturers, Chengli Special Purpose Vehicle has consistently adopted a factory-direct sales model. According to internal data, factory-direct pricing saves RMB 8,000–15,000 compared to 4S-channel pricing for identical configurations. So-called “strategic partnerships” are merely markups: intermediaries purchase vehicles from the factory and resell them at inflated prices. Countermeasure: Request the original Certificate of Conformity and chassis serial number, then verify directly via Chengli’s official hotline: . If the supplier cannot provide these documents, it is highly likely an intermediary. Tactic 2: “This model lacks complete official announcements—we can only register our custom-built version.” Reality: Chengli holds complete official announcements for 108 models—including CLW5070GSSD6—covering 44 vehicle categories. All models comply fully with national registration, annual inspection, and commercial operation requirements. Intermediaries frequently cite “incomplete announcements” to push non-standard modified vehicles, thereby circumventing factory warranty coverage. Countermeasure: Require the supplier to provide the official MIIT announcement number and verify it through the ‘Road Motor Vehicle Manufacturers and Products Information Inquiry System’. Chengli offers lifetime after-sales service for upper structures and nationwide authorized warranty for original chassis—non-standard vehicles are excluded from this coverage. Tactic 3: “We offer free configuration upgrades—exceptional value packages!” Reality: Chengli explicitly adheres to a policy of ‘transparent configuration—no bundled pricing’. Every component is priced individually. Intermediary ‘packages’ often include redundant functions or low-cost substitutes—for example, ordinary rubbe