Government procurement case and bid-winning solution analysis for the Linyi Model 3308 yellow-plate sewage treatment vehicle. I. Pre-tender preparation for government procurement: From needs assessment to budget planning. A municipal sanitation department plans to procure a batch of yellow-plate sewage treatment vehicles in 2025 for emergency sewage network maintenance and river cleaning tasks in urban areas. According to local procurement practices, such projects typically require needs evaluation six months in advance. Through on-site surveys, the department found that existing equipment is outdated and inefficient, urgently requiring a vehicle integrating suction, solid-liquid separation, and wastewater purification functions, with a yellow-plate chassis (gross vehicle weight ≥ 4.5 tons) to accommodate complex road conditions and extended operation. During budget formulation, referencing publicly available tender information, market prices for similar Model 3308 vehicles (e.g., Chengli CLW5180GSSD6, gross vehicle weight 18 tons) range from RMB 300,000 to 400,000. The department finalized its budget at no more than RMB 396,000, reserving approximately RMB 50,000 for operational and maintenance expenses. Key requirements include: compliance with China VI emission standards; chassis brand (Dongfeng or Sinotruk); superstructure material (stainless steel tank body); and after-sales service (nationwide chassis warranty and lifetime superstructure service). II. How to draft technical specifications: Key parameters and evaluation criteria. Technical specifications constitute the core of tender documents and directly influence bidder responsiveness. Below are typical requirements compiled from Chengli Special Purpose Vehicle’s product database (e.g., CLW5180GSSD6): 2.1 Chassis and Powertrain Chassis brand: Dongfeng, Sinotruk, Foton, FAW Jiefang, or Shaanxi Automobile—chassis announcement model number must be provided (e.g., EQ1180GL6DJ). Engine power: ≥160 kW, meeting China VI emission standards. Wheelbase: 3308 mm (corresponding to yellow-plate configuration). Tire size: 10.00R20 (per official announcement parameters). 2.2 Superstructure and Sewage Treatment System Sewage tank capacity: ≥8 m³, fabricated from Q345B stainless steel, minimum thickness ≥4 mm. Suction pump flow rate: ≥120 m³/h, head ≥15 m (per Chengli CLW5180GSSD6 specifications). Solid-liquid separation system: Screw-type extrusion unit, processing capacity ≥10 tons/hour. Water purification unit: Must meet Grade I-A discharge standards per GB18918–2002 (Urban Wastewater Treatment Plant Pollutant Discharge Standard). 2.3 Additional Requirements Equipped with high-pressure cleaning gun, pressure ≥20 MPa. Driver cabin air conditioning, rear-view camera, GPS positioning. After-sales service: Nationwide chassis warranty and lifetime superstructure service (Chengli provides 24-hour direct spare parts delivery). Evaluation criteria typically allocate weights as follows: price (30%), technical responsiveness (40%), after-sales service (20%), and enterprise qualifications (10%). For example, exceeding specified parameters—such as tank wall thickness—or using superior materials—e.g., stainless steel instead of carbon steel—may earn bonus points. III. Chengli’s support for bidding documentation: From official announcement certification to successful delivery. As the manufacturer, Chengli Special Purpose Vehicle Co., Ltd. (headquartered in Suizhou, Hubei Province; official website: www.clspecial.com) provides the following key supporting documents during the bidding process: MIIT Announcement: e.g., CLW5