I. Background of Urgent Demand: Emergency Procurement Under High Rainy-Season Load In summer 2025, the municipal sanitation department of a district in Fuzhou City discovered during routine inspections that the lift pump stations at two aging sewage treatment plants within its jurisdiction were frequently clogged, significantly increasing the risk of sewage overflow. The existing two small-scale sewage treatment vehicles—both over eight years old—suffered from high maintenance frequency and low treatment efficiency, rendering them incapable of meeting the sharply increased daily treatment demand during the rainy season. According to publicly released tender information, the unit initiated an emergency procurement process in July 2025 to acquire one 3308 yellow-plate sewage treatment vehicle, with a budget cap of approximately RMB 391,000. Requirements included high off-road capability, large processing capacity, and anti-corrosion and sealing design suitable for Fuzhou’s hot, humid climate. Fuzhou is located along the southeast coast, where annual average humidity exceeds 80%. Summers are hot and rainy, and vehicles operate outdoors for extended periods—posing severe challenges related to corrosion and sealant aging. In its tender documents, the client specifically emphasized two technical requirements: “chassis anti-corrosion coating” and “key sealing components resistant to humid-heat aging,” mandating suppliers to submit third-party test reports. II. Expedited Tender Process and Chengli’s Rapid Response This procurement adopted an “inquiry-based + competitive negotiation” model, completing the entire process—from requirement release to contract signing—in just 15 days. Upon learning of the opportunity, Chengli Special Purpose Vehicle Co., Ltd. immediately assigned Sales Manager Zhang Yue (Tel: ) to engage the client. Leveraging publicly available announcement parameters for models such as CLW5070GSSD6, Chengli proposed an upgraded configuration for the 3308 yellow-plate sewage treatment vehicle. Key comparative analysis is summarized below: Comparison of Candidate 3308 Yellow-Plate Sewage Treatment Vehicle Solutions for Fuzhou (Based on Public Tender Information) Parameter Item Chengli CLW5180GSSD6 Upgraded Version Competitor Brand B Client Minimum Requirement Chassis Model Dongfeng Dorcen D9 (3308 mm wheelbase) Sinotruk HOWO MAN 3308 mm wheelbase, yellow-plate compliant Effective Sewage Tank Capacity Approx. 8 m³ Approx. 7.5 m³ ≥7 m³ Anti-Corrosion Coating Process Electrophoretic coating + epoxy primer + polyurethane topcoat Standard phosphating + acrylic paint Electrophoretic coating required Sealing Component Material Fluoroelastomer O-rings + silicone gaskets nitrile rubber (NBR) Humid-heat aging resistance required Vacuum Pump Brand GERNA (Germany, imported) Domestic brand No specific requirement Delivery Lead Time 7–10 days (zero-inventory shipment) 20–25 days ≤15 days After-Sales Service Nationwide Dongfeng chassis warranty + lifetime upfit service Chassis warranty + 2-year upfit warranty Lifetime support required Unit Price (Reference Public Tender Data) Approx. RMB 328,000 Approx. RMB 345,000 ≤RMB 350,000 As shown above, Chengli’s proposal outperformed competitors in anti-corrosion process, sealing material, delivery lead time, and after-sales service—all while remaining within budget. Following two rounds of negotiations, the client signed a contract with Chengli in early August 2025 to procure one 3308 yellow-plate sewage treatment vehicle at a unit price of approximately RMB 328,000 (based on public tender data). III. Chengli’s Rapid Response and Delivery Execution Upon contract signing, Chengli activated its “Emergency Order Green Channel.” Benefiting from local manufacturing in Suizhou,