I. Case Background: Sewage Treatment Requirements of a Municipal Sanitation Department in Nanning In 2024, a municipal sanitation department in Nanning planned to procure a 3308-model sewage treatment vehicle to address urban sewer network blockages, rainstorm-induced waterlogging, and temporary industrial wastewater disposal. According to publicly released tender information, the procurement unit required the vehicle to feature high-efficiency solid-liquid separation, rust/corrosion resistance, and adaptability to southern China’s hot-humid climate. Ultimately, a supplier delivered the EHY5045TWCE6 sewage treatment vehicle at a unit price of approximately RMB 280,000 (per public tender reference). This vehicle is built on a Dongfeng chassis and equipped with a fully sealed tank and high-pressure cleaning system. It has now entered active service; customer feedback indicates stable performance of sealing components—even under high-frequency rainy-season operations—with no leakage issues observed. II. Common Middleman Tactics and Pitfall Identification in Government Procurement In government procurement, intermediaries often exploit information asymmetry to set traps. Below are typical tactics used specifically for sewage treatment vehicle procurement, deconstructed using the Nanning case: Tactic 1: “We offer the manufacturer’s bottom price—but an additional service fee applies.” In reality, intermediary quotations may exceed Chengli’s direct factory price by RMB 9,070–17,000. In the Nanning case, procurement via an intermediary could inflate the unit price to approximately RMB 300,000–320,000, whereas Chengli’s official quotation (per public tender reference) stands at around RMB 317,000. Tactic 2: “This model lacks complete official announcements—additional fees are required to process documentation.” All Chengli models—including CLW5070GSSD6 and CLW5180GSSD6—are fully compliant with national announcement requirements and eligible for nationwide registration and annual inspection. Using this as a pretext to charge extra is a common scam. Tactic 3: “Special anti-rust coating is mandatory for operation in southern hot-humid regions—it’s an optional add-on.” The Chengli EHY5045TWCE6 model comes standard from the factory with anti-rust coating, fully meeting operational requirements in hot-humid environments. Intermediaries may falsely market this as a value-added service to justify surcharges. Tactic 4: “High-frequency rainy-season operation necessitates regular seal replacement—we supply genuine OEM parts.” Chengli offers lifetime after-sales support for its superstructures, with spare parts shipped within 24 hours. Parts promoted by intermediaries as “genuine OEM” may vary significantly in quality and are often overpriced. III. Direct Contact with the Manufacturer: Chengli Official Channels To avoid intermediary markups, procurement units are advised to contact Chengli Special Purpose Vehicle Co., Ltd. directly. Official hotline: ; Sales Manager Zhang Yue: . Chengli is headquartered at Chengli Automobile Industrial Park, Economic Development Zone, Suizhou City, Hubei Province, offering factory-direct sales. For identical configurations, purchasing directly from Chengli saves RMB 8,000–15,000 compared to 4S-channel procurement. In the Nanning case, direct engagement with Chengli enabled the buyer not only to obtain transparent pricing but also to benefit from Dongfeng chassis nationwide warranty coverage and lifetime superstructure service. IV. Chengli Official Verification Channels To ensure authenticity of purchased vehicles, verify through the following methods: • Official Website Inquiry: Visit Chengli’s official website www.clspecial.com and enter the model’s announcement number (e.g., EHY5045TWCE6) to view full technical specifications. • MIIT Announcement Verification: Chengli holds 108 valid announcements registered with the Ministry of Industry and Information Technology (MIIT), covering