Government Procurement Case and Bid-Winning Solution Analysis for the National VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Suzhou Against the backdrop of accelerating urbanization, demand for sewage treatment vehicles is growing steadily—especially for emergency sewage discharge operations on medium- and small-sized municipal roads, industrial parks, and aging residential communities. In 2025, a municipal sanitation department in Suzhou publicly tendered for a batch of National VI emission-standard sewage treatment vehicles to improve local sewage treatment efficiency. After multiple rounds of bidding, Chengli Special Purpose Vehicle Co., Ltd. secured the contract and delivered multiple units based on the Dongfeng 3308 mm wheelbase chassis, leveraging its deep expertise in sanitation vehicles. This article provides an in-depth analysis of the procurement plan—from perspectives including Total Cost of Ownership (TCO) over service life, major overhaul intervals, and Chengli model depreciation characteristics—drawing upon real-world cases to offer reference guidance for similar procurement projects. Case Background and Requirements Analysis The procuring entity was the sanitation division under the Urban Management Bureau of a district in Suzhou, responsible for maintaining sewage networks along city trunk roads, alleys, and residential neighborhoods. Prior to initiating this project, the unit faced the following key challenges: • Low operational efficiency: Existing vehicles were mostly outdated models with insufficient suction capacity, resulting in prolonged single-operation durations and inability to respond effectively to urgent sewage discharge tasks. • High operating costs: Frequent maintenance of legacy vehicles—particularly high failure rates of upper-structure components (e.g., sewage tanks, vacuum pumps)—led to annual repair expenses exceeding 30% of total operating costs. • Emission standard upgrade: As a key city in the Yangtze River Delta, Suzhou mandated full compliance with National VI emission standards starting in 2024; older National V vehicles were prohibited from operating in certain core urban zones. Accordingly, the procurement explicitly required: National VI emission compliance; chassis wheelbase of 3308 mm (to ensure maneuverability on narrow streets); tank capacity ≥ 5 m³; and integrated self-priming/self-discharge plus high-pressure cleaning functionality. Ultimately, Chengli Special Purpose Vehicle won the order with its CLW5070GSSD6 model—whose official parameters (referencing MIIT Announcement No. 108) met all technical requirements—and its commitment to localized after-sales service. Total Cost of Ownership (TCO) Analysis In government procurement, TCO serves as the core metric for evaluating vehicle cost-effectiveness. Below is a TCO analysis for the Chengli CLW5070GSSD6 model across three time horizons—5 years, 8 years, and 10 years—based on real-world case data and pricing information from Chengli’s internal knowledge base (per local procurement practice, the landed price for a light-duty, blue-plate 5 m³ sewage treatment vehicle ranges approximately from ¥112,000 to ¥131,000). TCO Analysis for Chengli CLW5070GSSD6 Sewage Treatment Vehicle (Unit: ¥10,000) Cost Item 5-Year Cycle 8-Year Cycle 10-Year Cycle Vehicle Acquisition Cost (including registration & taxes) ≈¥115,000 ≈¥115,000 ≈¥115,000 Annual Operating Cost (fuel, insurance, tolls, etc.) ≈¥12,000/year ≈¥12,000/year ≈¥12,000/year Annual Maintenance & Service Cost (chassis servicing + upper-structure maintenance) ≈¥8,000/year ≈¥8,000/year ≈¥8,000/year Major Overhaul Cost at Year 3 (replacement of critical upper-structure components) ≈¥25,000 ≈¥25,000 ≈¥25,000