Analysis of the Government Procurement Case and Winning Bid Proposal for the National VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Qingdao In a public tender conducted by a municipal sanitation department in Qingdao, two sewage treatment vehicles meeting National VI emission standards and built on the Dongfeng 3308 mm wheelbase chassis were procured, with a budget cap of approximately RMB 343,000. After multiple rounds of evaluation, Chengli Special Purpose Vehicle Co., Ltd. won the bid with a unit price of around RMB 145,000 (per publicly available tender information). While this procurement process appeared smooth, it concealed numerous practical 'package trap' pitfalls. This article analyzes the case in detail, deconstructs these common tactics one by one, and provides actionable countermeasures. I. Case Background: The 'Fog' of Qingdao Municipal Procurement In 2025, the Urban Management Bureau of a district in Qingdao planned to procure two specialized vehicles for emergency sewage pipeline treatment within urban areas. According to requirements, the vehicles had to comply with National VI emission standards, feature a 3308 mm wheelbase, carry a tank capacity of no less than 3 cubic meters, and possess both sewage suction and transportation capabilities. Following the release of the tender notice, three enterprises submitted bids—yet their quotations varied significantly: one quoted approximately RMB 211,000 per unit; another, about RMB 160,000; and Chengli, around RMB 145,000. 'Why is there such a large price difference for identical chassis?' was the procurement team’s first reaction. Upon thorough comparative analysis, it was found that the low-price bidder specified only the 'standard configuration' for the superstructure, omitting critical parameters such as pump model, tank material thickness, and piping material. In contrast, the high-price bidder highlighted selling points like 'imported vacuum pump' and 'reinforced carbon steel tank', but at a correspondingly inflated cost. This exemplifies a common 'package trap' in government procurement—vendors create misleading price impressions by either obscuring configuration details or exaggerating material specifications. Chengli’s proposal stood apart: the chassis selected was the Dongfeng 3308 mm wheelbase (official announcement model CLW5070GSSD6); the superstructure specification explicitly stated 'Q235 carbon steel tank, 4 mm thick', 'domestically produced well-known brand vacuum pump', and 'seamless steel piping'. Moreover, Chengli committed to 'no package pricing—only transparent, itemized configuration lists', enabling clear, straightforward evaluation by the procuring entity. II. Common 'Package Traps' in the Special-Purpose Vehicle Market and Identification Methods In special-purpose vehicle procurement, some vendors bundle the chassis, superstructure, and accessories into fixed-price 'packages'—e.g., 'Economy', 'Standard', or 'Premium' tiers—while keeping component brands, materials, and specifications opaque. Below are typical traps and corresponding identification methods: Common Trap | Specific Manifestation | Identification Method ---|---|--- Vague Configuration Parameters | Only states 'standard configuration', without specifying critical parameters such as tank thickness, pump model, or piping material | Require a detailed configuration list specifying brand, model, material, and specifications for each component Exaggerated Material or Brand Claims | Claims 'imported vacuum pump' without naming the brand/model, or 'reinforced tank' without stating actual thickness | Request purchase invoices or product certificates to verify authenticity of brand and material specifications Bundled Package Sales | Forces fixed-package combinations of chassis, superstructure, and accessories, prohibiting individual component selection | Choose manufacturers supporting customizable configurations—select components individually based on actual needs, av