I. Case Background: First-time Procurement by a Newly Established Entity, Starting from Scratch. In early 2025, a municipal sanitation department—facing a sharp surge in local sewage treatment demand—launched its inaugural specialized vehicle procurement program. Having no prior experience operating such equipment, the unit’s team lacked familiarity with vehicle models, technical specifications, and budgeting. Per local procurement practices, the project budget was set at approximately RMB 896,000–1,345,000, with plans to procure two units of Dongfeng’s latest sewage treatment vehicles for urban pipeline networks, river channels, and emergency sewage discharge operations. Upon finalizing requirements, the unit issued a public tender notice via an official bidding information platform, stipulating that vehicles must comply with China VI emission standards and feature sewage suction, solid-liquid separation, and recirculation treatment capabilities; additionally, the chassis must be Dongfeng-branded to ensure localized after-sales service. II. Vehicle Selection Process: From Zero Knowledge to Finalized Solution. Facing a complete lack of prior selection experience, the unit initially consulted multiple suppliers but received widely divergent quotations and inconsistent technical specifications. A key turning point came when it contacted Chengli Special Purpose Vehicle Co., Ltd. (official website: www.clspecial.com). Chengli’s sales manager, Ms. Zhang Yue (phone: +86 ), did not immediately pitch products during the first consultation; instead, she delivered comprehensive technical advisory support: First, based on the unit’s daily treatment requirement of approximately 50 tons, she recommended the CLW5120TWC6 sewage treatment vehicle—a model modified on the Dongfeng DOLICA chassis—which is fully compliant with MIIT certification requirements and eligible for registration nationwide. Second, regarding budget constraints, she itemized the cost structure—including chassis, upper-body assembly, and optional accessories—and clarified that identical configurations would cost RMB 8,000–15,000 less than those purchased through authorized 4S dealerships. Third, she provided three real-world reference cases (e.g., five water-sprinkler trucks and mist cannons deployed at a Guangdong industrial park; ten 5-cubic-meter water-sprinkler trucks supplied to a Henan sanitation bureau), helping the unit visualize practical operational scenarios. After two weeks of iterative discussions, the unit finalized its selection: two units of Dongfeng’s latest sewage treatment vehicles, built on Dongfeng D9 chassis, equipped with stainless-steel tanks, high-power vacuum pumps, and automated sewage discharge systems—each priced at approximately RMB 550,000 (per publicly available tender data), keeping the total contract value under RMB 1.1 million. III. Winning Bid Solution Explained: Chengli’s End-to-End Consultation and Delivery. During the public tender process, Chengli Special Purpose Vehicle secured the contract with a competitive bid, complete MIIT certification documentation, and firm commitments to localized service support. Per the tender requirements, Chengli delivered the following core solution: | Item | Chengli’s Winning Bid Solution | Industry Average | |------|--------------------------------|------------------| | Chassis Model | Dongfeng D9 (China VI) | Dongfeng DOLICA / SINOTRUK | | Tank Capacity | 6 m³ stainless steel | 5–7 m³ carbon steel | | Sewage Suction Rate | ≥120 m³/h | 100–150 m³/h | | Solid-Liquid Separation Efficiency | ≥95% | 85–90% | | Delivery Lead Time | 12 working days | 15–30 days | | After-Sales Support | Nationwide chassis warranty + lifetime upper-body assembly service | Standard 1-year warranty | | Budget Control | ~RMB 550,000/unit (per publicly available tender data) | RMB 600,000–700,000/unit | Additional highlights of the solution include Chengli’s one-stop service—from manufacturing to registration