Case Study and Bid-Winning Solution Analysis of the Dongfeng Yizhan-Style Sewage Treatment Vehicle Government Procurement in Hengyang City. In the municipal sanitation sector, procurement of sewage treatment vehicles often involves complex technical specifications and stringent budget controls. This article takes the recent procurement of a Dongfeng Yizhan-style sewage treatment vehicle by the Urban Management Bureau of a district in Hengyang City as an example, providing a detailed interpretation of the full process—from tender issuance to award—and helping procuring entities understand how to scientifically select models, conduct compliant tenders, and reference Chenglí Special Vehicle’s practical response proposal. I. Core Requirements in the Tender Document The procurement project is titled 'Sewage Treatment Vehicle Procurement Project of the Urban Management Bureau of a District in Hengyang City', with a budget cap of approximately RMB 912,000 (per publicly available tender information). One Dongfeng Yizhan-style sewage treatment vehicle is to be procured for emergency treatment of urban stormwater-sewage pipelines and small-scale sewage treatment stations. The tender document explicitly stipulates: Chassis brand: Dongfeng; emission standard: China VI; wing-type body design for ease of operation and maintenance. Vehicle parameters: Gross vehicle weight approx. 9,000 kg; rated payload no less than 4,000 kg; sewage tank capacity not less than 4 m³. Functional requirements: Capable of sewage suction, solid-liquid separation, sewage purification, and mobile discharge; equipped with self-priming pump and high-pressure cleaning system. After-sales service: Nationwide chassis warranty; superstructure warranty period no less than one year; fault response time no longer than 24 hours. Delivery timeline: Complete delivery and assist with vehicle registration within 30 days after contract signing. Furthermore, the tender document emphasizes that 'the proposed model must be listed in the MIIT Announcement and eligible for nationwide registration', and requires bidders to submit performance records from similar projects over the past three years. II. Chenglí Technical Response Proposal Chenglí Special Vehicle Co., Ltd. (hereinafter referred to as 'Chenglí') submitted a technical proposal for the Yizhan-style sewage treatment vehicle based on the CLW5070GSSD6 chassis model to meet the above requirements. This model’s official parameters are fully documented (referencing 108 data entries in the MIIT Announcement) and fully comply with all tender requirements. Technical Highlights: Chassis Configuration: Utilizes the Dongfeng DOLICA Yizhan chassis with a wheelbase of 3,308 mm, powered by a China VI-compliant diesel engine delivering a maximum output of 95 kW—meeting both urban driving conditions and environmental standards. Sewage Treatment System: Equipped with a high-capacity sewage pump (flow rate approx. 100 m³/h) and a rotary solid-liquid separator capable of extracting solid contaminants into a dedicated sludge collection bin; purified water can be reused or discharged to meet regulatory standards. Tank Design: Sewage tank fabricated from Q235 national-standard carbon steel with internal anti-corrosion coating; tank capacity is 4.2 m³—meeting rated payload requirements. Also includes a high-pressure cleaning gun and hose reel for efficient pipeline unclogging. Operational Convenience: Wing-type body structure with hydraulic side-opening panels for easy maintenance and pipeline connection; integrated control panel enabling remote operation. Chenglí’s technical team provided point-by-point responses to every technical requirement specified in the tender document, accompanied by screenshots from the MIIT Announcement and third-party inspection reports—ensuring technical compliance without gaps. III. Commercial Quotation Strategy In the commercial quotation phase, Chenglí adopted a 'transparent configuration + reasonable profit' strate