Analysis of the Government Procurement Case and Bid-Winning Solution for the Dongfeng Yizhan-Style Sewage Treatment Vehicle in Suzhou — Against the backdrop of increasingly stringent environmental policies, upgrading urban sewage treatment infrastructure has become a top priority for sanitation departments nationwide. In 2025, the Urban Management Bureau of a district in Suzhou publicly tendered for a batch of sewage treatment vehicles to address aging community pipeline blockages, emergency river treatment, and industrial park wastewater management. This article analyzes the procurement process, technical requirements, and Chengli Special Purpose Vehicle’s delivery solution based on this case, offering reference for similar projects. Case Background and Procurement Requirements As an economic hub in the Yangtze River Delta region, Suzhou features a complex urban drainage network, with rainwater and sewage mixing issues present in certain areas. To enhance emergency response capabilities, the district’s Urban Management Bureau planned to procure five sewage treatment vehicles, requiring high-efficiency separation, water recycling capability, and mobility. According to the tender notice, vehicles must be built on Dongfeng chassis, with an upper-body assembly capable of processing no less than 50 tons of wastewater per day and handling complex wastewater containing oil and sediment. Based on publicly available tender information, the project budget was capped at approximately RMB 3.099 million, with an estimated unit price of around RMB 550,000. The procuring entity specifically emphasized compliance with China VI emission standards, complete official vehicle announcements (for registration and annual inspection), creating opportunities for manufacturers like Chengli Special Purpose Vehicle that possess comprehensive announcement qualifications. Model Selection: Why Did the Dongfeng Yizhan-Style Win? Among numerous chassis brands, the Dongfeng Yizhan-style stood out due to its low center of gravity, high load-bearing capacity, and nationwide warranty service. Chengli Special Purpose Vehicle’s Dongfeng Yizhan-style sewage treatment vehicle is modified from the Dongfeng Dollyka chassis and features a wing-opening cargo compartment, facilitating internal equipment maintenance and operation. Its official model number is CLW5070GSSD6 (referencing chassis specifications); the upper-body assembly employs advanced membrane separation technology to enable post-treatment water reuse. Compared with other models, the Dongfeng Yizhan-style offers the following advantages: • Chassis Reliability: Dongfeng chassis offer nationwide warranty coverage and dense service networks, reducing long-term maintenance costs. • Transparent Configuration: Chengli does not adopt bundled pricing; instead, configurations are customized per customer needs—e.g., tank material, pump set model selection. • Delivery Lead Time: Standard models can be delivered within 7–15 days, meeting urgent procurement timelines. Tender Process and Chengli’s Winning Proposal This tender adopted an open competitive negotiation method, with four enterprises participating. As a leading manufacturer based in Suizhou City, Hubei Province, Chengli Special Purpose Vehicle secured the contract thanks to the following strengths: • Direct Factory Sales (No Middlemen): Compared with 4S-channel suppliers, identical configurations cost approximately RMB 8,000–15,000 less—providing a decisive edge in budget-constrained projects. • Comprehensive Announcement Coverage: Chengli maintains 946 product entries across 44 categories, including full announcement compliance for sewage treatment vehicles—ensuring nationwide registration eligibility. • After-Sales Support: Original-chassis nationwide warranty plus lifetime upper-body assembly service, with spare parts shipped within 24 hours—eliminating operational concerns. Ultimately, Chengli delivered five Dongfeng Yizhan-style sewage treatment vehic