In the Dalian region, winter’s low temperatures and humid-cold climate impose stringent requirements on municipal sewage treatment vehicles’ starting performance and hydraulic system stability. A municipal sanitation department recently launched a procurement project for blue license plate sewage treatment vehicles, with a budget capped at approximately RMB 279,000 (based on publicly available tender information). After multiple rounds of evaluation and on-site inspections, Chengli Special Purpose Vehicle Co., Ltd. was ultimately selected to supply its Dongfeng D6 chassis-based blue license plate sewage treatment vehicle solution. This article analyzes common market package pricing tactics based on this real-world case, and explains how transparent configuration verification and attention to winter-specific performance details can support efficient, transparent government procurement decisions. I. Common Market Package Pricing Tactics: The 'Hidden Costs' Behind the Price Tag In government procurement, 'package pricing' is a marketing tactic frequently employed by some suppliers. On the surface, a single quoted price appears to cover the chassis, upper-body assembly, and certain accessories—seemingly cost-effective. In reality, however, it often conceals numerous 'hidden costs.' Below are typical tactics encountered in this Dalian case: | Package Item | Common 'Package Pricing' Content | Actual Missing or Downgraded Configurations | Potential Impact on Winter Operations in Dalian | |--------------|----------------------------------|---------------------------------------------|------------------------------------------------| | Chassis | Dongfeng D6 blue license plate chassis (China VI emission standard) | No explicit specification of engine preheater, low-temperature starting battery, or antifreeze specifications | Possible starting difficulties below -20°C, increasing maintenance costs | | Hydraulic System | Standard hydraulic pump and hydraulic oil tank | No low-temperature hydraulic oil, hydraulic oil heater, or insulated hydraulic tubing sleeves | Increased hydraulic oil viscosity at low temperatures leads to sluggish system response and higher risk of hydraulic cylinder failure | | Upper-Body Tank | Carbon steel tank (4 mm thickness) | No stated corrosion-resistant coating, insulation layer thickness, or internal anti-corrosion lining | Strong sewage corrosivity combined with winter ice expansion may cause weld seam cracking | | Electrical System | Conventional electrical control cabinet | No low-temperature battery, insufficient wire harness waterproofing rating, no preheating control module | Reduced battery capacity and increased electrical fault rates in cold conditions | | After-Sales Service | 'Nationwide warranty coverage' | No clear specification of local service outlets in Dalian or emergency response timeframes during winter | Delayed repairs during winter failures may disrupt operations | In the above tactics, suppliers often use the term 'standard configuration' to avoid disclosing critical low-temperature adaptations. Although their final quoted price may appear RMB 11,000–22,000 lower than Chengli’s, the delivered vehicle may fail to operate reliably in Dalian’s winter conditions—resulting in significantly higher post-delivery retrofitting and repair expenses. II. Seeing Through the Tactics: Chengli’s Transparent Configuration Commitment and Winter Performance Assurance Chengli Special Purpose Vehicle Co., Ltd.’s approach in the Dalian project exemplifies its core advantage: 'transparent configurations, no package pricing.' Specifically addressing Dalian’s cold, humid operating environment, Chengli explicitly specified the following key configurations in its proposal: 1. Freeze-Resistant Starting Performance The Dongfeng D6 chassis used by Chengli (e.g., model CLW5070GSSD6, compliant with MIIT announcements) comes standard with an engine preheater, low-temperature cold-start assist device, -35°C antifre