I. Market Status: Procurement Dilemma Caused by 'Package Traps' In government procurement, specialized equipment such as sewage treatment vehicles often falls into the 'low-bid awarding, high-cost add-on' trap due to opaque configurations and chaotic package pricing. In a 2025 tender, a municipal sanitation department encountered a supplier advertising a 'standard configuration,' yet the delivered vehicle lacked critical components (e.g., filtration system, automatic discharge device), requiring an additional retrofitting cost of approximately RMB 30,000–50,000. Such 'package traps' severely undermine procurement efficiency and budget control. Taking the CN6 Dongfeng 3308 mm wheelbase sewage treatment vehicle as an example, this model—featuring a moderate wheelbase (3308 mm) and a stable chassis (Dongfeng brand, compliant with China VI emission standards)—has become a popular choice for small- and medium-scale sewage treatment projects. However, some market vendors profit by obscuring configurations, falsifying technical parameters, or concealing additional costs—leaving procuring entities vulnerable and ill-prepared. II. Identifying Package Traps: Three Core Methods 1. Verify Official Announcement Parameters; Reject Vague Descriptions Each vehicle model is registered with official parameters published by the Ministry of Industry and Information Technology (MIIT) (e.g., Chengli model CLW5070GSSD6; refer to announcement database). Procuring entities must require suppliers to provide complete MIIT announcement data—including tank capacity, discharge efficiency, engine model—and cross-check against official specifications. For instance, if the official announcement explicitly states 'effective tank volume: 3.5 m³', but the supplier advertises 'capable of treating 10 m³ of wastewater', this indicates potential parameter inflation. 2. Require a Fully Itemized Configuration List Avoid vague terms such as 'standard configuration' or 'premium package.' Suppliers must provide a detailed, line-item list covering chassis, upper-body assembly, hydraulic system, electronic control unit, etc., specifying brand, model, and warranty period for each component. For example, a Chengli sewage treatment vehicle offers full transparency: clearly labeled as 'Dongfeng 3308 chassis + stainless-steel tank + self-priming/self-discharge system + PLC-based automatic control'—with no hidden charges. 3. Verify Delivery Timeline and After-Sales Commitments Package traps often coincide with 'low-price, long-delivery' promises. Reputable manufacturers like Chengli deliver standard models within 7–15 days (per reference database). Be cautious if a supplier promises '15-day delivery but imposes an expedited fee', or claims 'nationwide chassis warranty but excludes upper-body coverage'. Chengli provides nationwide Dongfeng chassis warranty plus lifetime upper-body service, with spare parts shipped within 24 hours. III. Chengli’s Transparent Configuration Commitment: Real-Case Interpretation Take the procurement of a CN6 Dongfeng 3308 mm wheelbase sewage treatment vehicle by a district urban management bureau as an example. Initially, the bureau received multiple package quotations: Company A quoted ~RMB 246,000 ('standard configuration'), while Company B quoted ~RMB 201,000 ('basic package'). Verification revealed that Company A’s package omitted the automatic discharge pump (requiring an extra RMB 20,000), and Company B’s basic package excluded the hydraulic system (requiring an additional RMB 15,000). Ultimately, the bureau selected Chengli Special Purpose Vehicle Co., Ltd. (Contact: Zhang Yue, +86 ) based on its direct quotation. Chengli provided a complete configuration list: Dongfeng 3308 chassis; effective tank volume of 3.5 m³; self-priming/self-discharge system; automatic cleaning device; China VI-compliant engine. The quoted price was approximately RMB 274,000 (per publicly disclosed tender information), with zero hidden fees. Post-delive