Government Procurement Case of National VI Dongfeng 3308mm Wheelbase Sewage Treatment Vehicle in Tianshui: Analysis of the Low-Bid Trap and Chengli’s Solution. In recent years, tightening environmental regulations have spurred surging demand for sewage treatment vehicles among municipal sanitation departments nationwide. In late 2025, a district urban management bureau in Tianshui launched a procurement initiative with a budget capped at approximately RMB 508,000, aiming to acquire two National VI-compliant Dongfeng sewage treatment vehicles with a 3308mm wheelbase. However, during the initial bidding phase, multiple suppliers submitted bids 20% below market price—raising concerns over authenticity of specifications and long-term operational costs. This article uses this case as a backdrop to analyze common low-bid tactics and explain how Chengli Special Purpose Vehicles ensures cost-effectiveness in government procurement through transparent configurations and rational pricing. Case Background: Procurement Requirements of a District Urban Management Bureau in Tianshui Due to insufficient local sewage treatment capacity, a district urban management bureau in Tianshui needed to procure two National VI-emission-standard sewage treatment vehicles with a 3308mm wheelbase. Following local procurement conventions, the budget was set at approximately RMB 254,000 per unit, totaling around RMB 508,000. During the tender process, five enterprises participated in the bidding; three submitted bids 20% below the market average price, with the lowest bid reaching about RMB 203,000 per unit. However, such low-priced products often involve specification reductions, leading to high subsequent maintenance costs or failure to operate normally. According to product data from Chengli Special Purpose Vehicles’ knowledge base (model CLW5070GSSD6), a compliant National VI Dongfeng sewage treatment vehicle with a 3308mm wheelbase must include: an original Dongfeng chassis, a National VI engine, a fully stainless-steel tank body, an efficient sewage treatment system (including sedimentation, filtration, and disinfection modules), and an automatic control system. Low-cost alternatives commonly reduce costs via the following methods. The Low-Bid Trap: Risks Associated with Prices 20% Below Market Level In similar cases, a municipal sanitation department once purchased a sewage treatment vehicle priced 20% below market level—only to encounter frequent failures: • Chassis Quality Downgraded: Use of non-original or refurbished chassis, resulting in failure to pass environmental inspections during annual vehicle certification. • Tank Material Downgraded: Replacement of stainless-steel tanks with ordinary carbon steel, causing rusting and leakage after one year of use—with repair costs exceeding tens of thousands of RMB. • Sewage Treatment System Simplified: Omission of critical filtration or disinfection modules, leading to substandard treatment performance and mandatory rectification orders from environmental authorities. • After-Sales Support Absent: Low-price suppliers lack dedicated after-sales service teams; equipment breakdowns result in repair lead times up to one month, severely disrupting daily operations. These risks are especially critical in government procurement. After thorough research, the district urban management bureau in Tianshui opted for a supplier offering transparent configurations and reasonable pricing—and ultimately entered into cooperation with Chengli Special Purpose Vehicles. Common Specification-Reduction Tactics: How to Identify Them? Based on Chengli Special Purpose Vehicles’ knowledge base FAQ (588 frequently asked questions), purchasers can identify specification reductions using the following methods: • Chassis Model Verification: A compliant National VI Dongfeng sewage treatment vehicle with a 3308mm wheelbase must utilize an original Dongfeng chassis (e.g., the officially announced model CLW5070GSSD6), not alternative