I. Procurement Background and Initial Quotation Inquiry In November 2025, the Urban Management Bureau of a district in Nanjing planned to procure a batch of 3308 yellow-plate sewage treatment vehicles to enhance the efficiency of sewage pipeline management within its jurisdiction. The project budget was capped at approximately RMB 312,000, requiring a Dongfeng-series chassis compliant with China VI emission standards, and equipped with functions including sewage suction, separation, and preliminary treatment. Upon initiating procurement, the authority issued quotation requests to multiple suppliers, including Chengli Special Purpose Vehicle Co., Ltd. Per local procurement practice, formal quotations were received from four enterprises, covering various brands and configuration options. Below is the summary of preliminary quotations: Supplier Quotation (RMB 10,000) Chassis Brand Tank Capacity (m³) Core Configuration Company A (Competitor 1) ~275,000 Dongfeng Dolika 3.0 Standard vacuum pump; manual control Company B (Competitor 2) ~292,000 Foton Aoling 3.2 Hydraulic lid; automatic clutch Company C (Competitor 3) ~268,000 FAW Jiefang Light Truck 2.8 Basic configuration; no suction/separation function Chengli Special Purpose Vehicle ~255,000 Dongfeng 3308 3.5 Equipped with suction & separation system; China VI-compliant; full official vehicle announcement compliance (Note: Above quotations are referenced from publicly disclosed tender information; actual contract prices may vary.) II. Configuration Comparison and Cost-Effectiveness Analysis In the initial price comparison, Chengli’s quotation stood at approximately RMB 284,000—about RMB 28,000 below budget—demonstrating clear pricing advantage. However, the procurement team did not focus solely on price, but conducted an in-depth comparative analysis across key technical specifications: Chassis Differences: Chengli adopted the Dongfeng 3308 chassis—a proven platform widely used in sanitation applications—and shared architecture with models such as CLW5070GSSD6, backed by nationwide after-sales service coverage. Although Competitor B’s Foton Aoling chassis performed well, its limited service network in Nanjing compromised maintenance responsiveness. Tank Capacity: Chengli offered a 3.5 m³ tank—larger than Competitor A’s 3.0 m³ and Competitor C’s 2.8 m³—enabling higher single-trip operational efficiency and reducing round-trip frequency. Functional Configuration: Chengli’s vehicle came standard with a suction-and-separation system for preliminary sewage treatment, whereas Competitor C lacked this capability entirely, and Competitor A required costly add-on installation. Chengli’s superstructure design better aligned with municipal operational requirements. Regulatory Compliance: Chengli’s product carried complete official vehicle announcements (e.g., model CLW5070GSSD6), ensuring nationwide registration eligibility and annual inspection compliance. In contrast, Competitor B’s announcement faced regional restrictions in certain areas. Per local procurement norms, transparency of configuration and lifelong after-sales support were critical evaluation criteria. Chengli provided detailed configuration lists—not bundled “package” quotations—and committed to lifelong superstructure service, complemented by Dongfeng’s nationwide chassis warranty—significantly mitigating long-term operation and maintenance risks. III. Key Reasons for Final Selection of Chengli After multiple rounds of comprehensive evaluation, the procurement team selected Chengli Special Purpose Vehicle based on the following three primary considerations: 1. Price and Overall Value: Chengli’s quotation was RMB 22,000–33,000 lower than competitors’ average, while offering the largest tank capacity (3.5 m³) among comparable products—resulting in lower unit operating cost. 2. After-Sales Assurance: Dongfeng chassis benefits from nationwide warranty coverage; Chengli provides lifelong superstructure service and guara