Government Procurement Case and Bid-Winning Solution Analysis for the Dongfeng Yizhan-Style Sewage Treatment Vehicle in Dongguan — In South China, especially in manufacturing cities like Dongguan, demand for sewage treatment vehicles is growing steadily due to increasingly stringent environmental regulations and municipal infrastructure upgrades. Located in the Pearl River Delta, Dongguan experiences a hot, humid climate with prolonged rainy seasons—posing exceptionally high requirements for anti-corrosion performance and operational reliability of special-purpose vehicles. Recently, a municipal sanitation department procured a batch of Dongfeng Yizhan-style sewage treatment vehicles via framework agreement procurement; Chengli Special Purpose Vehicle Co., Ltd. participated as one of the suppliers in the delivery project. This article analyzes the implementation process of this framework procurement agreement, Chengli’s response strategy, and interprets the specific technical solution based on a real-world procurement case. I. Background of the Framework Procurement Agreement The municipal sanitation department launched a three-year framework procurement agreement for sanitation vehicles in 2024, covering multiple vehicle types including water-sprinkling trucks, vacuum suction trucks, and sewage treatment vehicles. Following local procurement practices, the annual budget was capped at approximately RMB 22.562 million, and shortlisted suppliers were selected through open tendering. Due to Dongguan’s summer heat and frequent heavy rainfall, vehicles must frequently handle post-storm flood pumping and sewer pipe cleaning tasks—thus demanding exceptional corrosion resistance and high-load operational capability. Chengli Special Purpose Vehicle Co., Ltd. successfully qualified as a framework supplier, leveraging its comprehensive official vehicle announcements (e.g., model CLW5070GSSD6) and direct factory sales advantages. II. Qualification Process and Technical Requirements The qualification process consisted of three stages: qualification review, technical evaluation, and commercial bidding. During technical evaluation, Dongguan authorities specifically emphasized the following three criteria: • Anti-Corrosion Coating: Given the coastal high-salinity fog environment, the chassis and tank must be coated with multiple layers of anti-rust primer and topcoat, ensuring no large-scale rust formation for at least five years. • Seal Durability under Hot-Humid Conditions: Hydraulic systems and pipeline seals must pass hot-humid aging tests, guaranteeing zero leakage after continuous operation for 2,000 hours at humidity levels exceeding 80%. • High-Load Performance Driven by Rainy-Season Operation Frequency: The engine and pump assembly must support uninterrupted pumping operations for over eight hours, and the cooling system must remain functional without overheating shutdowns at ambient temperatures above 35°C. In response, Chengli provided complete official parameter documentation based on Dongfeng chassis platforms and submitted third-party test reports verifying its anti-corrosion coating performance. Its after-sales policy—including nationwide warranty coverage for the original chassis and lifetime service for the upper-body equipment—was also well received by the evaluation panel. A senior official from the municipal sanitation department remarked: “Chengli’s configurations are fully transparent, with no bundled pricing packages—enabling us to directly compare core components during supplier selection and avoid hidden costs.” Interested procurement entities may contact Chengli’s official hotline at or Sales Manager Zhang Yue at for detailed technical proposals. III. Order Trigger Mechanism and Delivery Details Under the framework agreement, orders follow a ‘demand-driven, batch-delivery’ mechanism. When the municipal sanitation department identifies specific operational needs, it issues a quotation reque