Government procurement case of yellow-plate sewage treatment vehicles in Jinan: Analysis of Chengli's winning proposal and technical response. In the municipal sanitation sector, sewage treatment vehicles—versatile solutions for emergency flood drainage, river dredging, and septic tank cleaning—often involve complex bidding processes. Taking the public tender issued by a district Urban Management Bureau in Jinan in 2025 for '3-cubic-meter sewage treatment vehicles' as an example, the project budget was capped at approximately RMB 396,000, with Chengli Special Purpose Vehicle Co., Ltd. ultimately delivering two yellow-plate sewage treatment vehicles. This article provides an in-depth analysis of the procurement case across five dimensions: core tender requirements, Chengli’s technical response, commercial quotation strategy, bid award outcome, and post-sales service—offering practical insights for industry users. Core Tender Requirements According to publicly available tender information, the key technical specifications and commercial requirements for this procurement were as follows: Vehicle Type Requirement: Yellow-plate vehicle, suitable for suction, transport, and preliminary treatment of urban sewage, septic tank waste, and river silt; must be listed in the national vehicle announcement, enabling normal registration, annual inspection, and commercial operation. Tank Capacity: ≥3 cubic meters, manufactured from high-strength steel plates with corrosion resistance. Chassis & Powertrain: Requires chassis from Dongfeng or Sinotruk, meeting China VI emission standards; engine power ≥85 kW; equipped with ABS anti-lock braking system. Specialized Functions: Must integrate both vacuum suction and pressure filtration capabilities; suction depth ≥6 meters; equipped with sewage separation or preliminary purification equipment (e.g., pressure filtration chamber or sedimentation system). Commercial Terms: Tax-inclusive delivered price, including transportation, license plate registration, and first maintenance service; minimum warranty period of 1 year; after-sales service response time ≤24 hours. Notably, the tender document specifically emphasized 'complete official announcements and nationwide registration eligibility', effectively excluding non-standard modified vehicles and imposing stringent requirements on manufacturers’ official announcement qualifications. Chengli’s Technical Response Proposal In response to the project requirements, Chengli Special Purpose Vehicle recommended the CLW5070GSSD6 series sewage treatment vehicle, based on a Dongfeng chassis. This model is fully registered in the MIIT (Ministry of Industry and Information Technology) vehicle announcement database, with a precisely calibrated tank capacity of 3 cubic meters—fully compliant with yellow-plate vehicle announcement requirements. Chassis Configuration: Utilizes the Dongfeng DOLICA D6 series chassis, powered by either a Quanchai or Yunnan Internal Combustion Engine meeting China VI standards, delivering ~85 kW output; equipped with power steering, clutch assist, air conditioning, and ABS. Superstructure Design: Tank constructed from 5 mm-thick carbon steel plates with internal anti-corrosion coating; fitted with a vacuum pump (verified suction depth ≥7 meters) and a pressure filtration chamber enabling solid-liquid separation—reducing subsequent cleaning and disposal costs. Announcement Compliance: The CLW5070GSSD6 model is officially listed in MIIT Announcement No. 350, ensuring seamless registration at vehicle administration offices nationwide without regulatory risk. Delivery Timeline: Chengli’s Suizhou factory operates on a zero-inventory dispatch model; standard models are guaranteed delivery within 15 days—approximately 5–7 days faster than competing brands. During the technical clarification session, Chengli Sales Manager Zhang Yue (Tel: +86 ) provided detailed on-site vehicle videos and parameter sheets, and committed to 'nationwide