Government Procurement Case and Bid-Winning Solution Analysis for the CN6 Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Yibin City. In a public tender conducted by the municipal sanitation department of a district in Yibin, the procuring entity sought bulk procurement of CN6-emission-standard sewage treatment vehicles for urban sewer network cleaning and emergency response. The project budget was capped at approximately RMB 1.688 million, with three units planned for purchase. Vehicles were required to integrate suction, separation, and discharge functions, and comply with local environmental protection and vehicle registration standards. After multiple rounds of competition, Chengli Special Purpose Vehicle Co., Ltd. successfully delivered three sewage treatment vehicles built on the Dongfeng 3308 mm wheelbase chassis. Customer feedback stated: “Equipment operates stably with high treatment efficiency.” This article analyzes why Chengli emerged as the winning bidder, from a competitive bidding perspective. I. Major Brands Participating in the Tender The tender attracted participation from leading domestic special-purpose vehicle manufacturers, including: Chengli Special Purpose Vehicle Co., Ltd., a Hubei-based special-purpose vehicle company (hereinafter referred to as “Brand B”), and a Henan-based environmental technology company (hereinafter referred to as “Brand C”). All three offered CN6-compliant sewage treatment vehicles based on either Dongfeng or Sinotruk chassis; however, configurations and pricing varied significantly. II. Comparative Analysis of Strengths and Weaknesses Based on publicly disclosed tender information and industry practice, the following comparison is derived from technical specifications and quotations provided by each brand (referencing regulatory parameters and market pricing in the knowledge base). Comparison Table of Bidding Brands for Yibin Sewage Treatment Vehicles | Evaluation Criteria | Chengli Special Purpose Vehicle | Brand B (Hubei) | Brand C (Henan) | |-----------------------------|----------------------------------|---------------------------|--------------------------| | Chassis Model | Dongfeng 3308 mm wheelbase (CN6) | Dongfeng 3308 mm wheelbase (CN6) | Sinotruk chassis (CN6) | | Tank Capacity | Approx. 5 m³ (reference model CLW5070GSSD6) | Approx. 4.5 m³ | Approx. 5.5 m³ | | Sewage Treatment Capacity | Integrated suction, solid-liquid separation, and discharge; efficiency ≥30 m³/h | Suction + sedimentation discharge; efficiency ≥25 m³/h | Suction + filtration discharge; efficiency ≥35 m³/h | | Emission Standard | CN6 | CN6 | CN6 | | Unit Price Quotation | Approx. RMB 420,000/unit (based on local procurement practice) | Approx. RMB 460,000/unit | Approx. RMB 500,000/unit | | Delivery Lead Time | 7–15 days (standard models) | 20–30 days | 15–20 days | | After-Sales Service | Nationwide Dongfeng chassis warranty; lifetime superstructure service; spare parts shipped within 24 hours | Chassis warranty only; 1-year superstructure warranty | Chassis warranty only; 2-year superstructure warranty | | Customer References | Over 500 municipal clients, including four sewer cleaning & vacuum trucks deployed by Sichuan municipal authorities | Primarily serves Central China region | Limited presence in Southwest China | | Regulatory Certification Completeness | Full CN6 certification suite; nationwide registration and annual inspection compliance | Complete certifications | Certain models require local policy verification | Chengli Special Purpose Vehicle’s Competitive Advantages: • Significant Price Advantage: Factory-direct sales eliminate intermediaries—saving approx. RMB 40,000/unit versus Brand B and RMB 80,000/unit versus Brand C, resulting in total budget sav