A municipal sanitation department in Xianyang procured a National VI Dongfeng 3308 mm wheelbase sewage treatment vehicle: A practical case study—from hidden package traps to transparent configuration. In Q3 2025, a municipal sanitation department in Xianyang, Shaanxi Province, issued a procurement requirement for a 'National VI Dongfeng 3308 mm wheelbase sewage treatment vehicle.' The budget was capped at approximately RMB 332,000 (per publicly available tender information), with plans to purchase two units for emergency sewage network management in urban areas. However, during the tender process, procurement staff discovered that many suppliers’ quotation proposals concealed 'package traps'—appearing inexpensive at first glance, yet significantly mismatched with actual requirements. This article analyzes this case in detail to illustrate how to identify and avoid such traps, and introduces Chengli Special Purpose Vehicle’s transparent configuration solution. I. Common Market Package Quotation Tactics: 'Hidden Downgrades' Behind Low Prices In the special-purpose vehicle procurement sector, 'package quotations' are a common tactic used by some suppliers. For instance, regarding the Xianyang procurement of the National VI Dongfeng 3308 mm wheelbase sewage treatment vehicle, one supplier quoted approximately RMB 254,000 (per publicly available tender information); however, upon closer inspection of technical specifications, critical issues emerged: • Chassis Configuration Downgraded: Although labeled as 'Dongfeng 3308 mm wheelbase,' the actual chassis used was an older non-National VI emission-compliant model, or a low-specification variant from the Dongfeng Light Truck series—lacking essential safety features such as ABS and power steering. • Sewage Treatment System Compromised: Core components—including sewage pumps, separators, and tank material—were sourced from refurbished or non-standard parts, resulting in treatment efficiency below 50%. • Suction Capacity Overstated: Claimed 'suction depth of 8 meters,' but real-world testing showed only ~5 meters achievable, and no anti-overflow protection device was included. • After-sales Service Ambiguously Defined: While 'nationwide warranty coverage' was promised, the scope of warranty coverage for chassis versus upper-body equipment remained unspecified—leading to out-of-pocket repair costs in practice. Such packages typically lure customers with artificially low prices, yet subsequent modification and maintenance expenses far exceed the initial budget. During preliminary screening, Xianyang’s procurement team found that key parameters—including 'sewage tank capacity' and 'hydraulic system pressure'—were omitted from multiple suppliers’ quotation sheets, replaced only with vague terms like 'standard configuration.' II. Four Key Methods to Identify Package Traps Drawing on Chengli Special Purpose Vehicle’s experience serving over 500 municipal sanitation authorities, identifying package traps requires attention to the following four aspects: 1. Verify Official Announcement Parameters: Require suppliers to provide the MIIT (Ministry of Industry and Information Technology) announcement model number (e.g., CLW5070GSSD6 for water-sprinkling vehicles; CLW5180GSSD6 for large-capacity vehicles), and cross-check consistency of chassis model, emission standard, wheelbase, and tank dimensions against official announcements. Chengli Special Purpose Vehicle maintains 108 fully documented announcement parameters, with all models accessible for online verification. 2. Demand Full Configuration Transparency: Reject 'package quotations' and require itemized configuration lists—including chassis brand, engine output, sewage pump model, tank material thickness (e.g., 4 mm / 6 mm stainless steel), and hydraulic system manufacturer. Chengli Special Purpose Vehicle guarantees 'configuration transparency—no package quotations.' Procurement personnel may contact Sales Manager Zhang Yue directly (1507165