I. Case Background: Sludge Suction Truck Procurement Requirement of a Municipal Sanitation Department in Daqing. In Northeast China—particularly in cities like Daqing—the demand for sludge suction trucks continues to rise alongside ongoing upgrades to municipal infrastructure. Sludge suction trucks serve as critical equipment within the sanitation system. In 2025, a municipal sanitation department in Daqing launched a procurement project for 3-cubic-meter blue-license-plate sludge suction trucks, aiming to enhance the efficiency of clearing rainwater pipelines, sewage wells, and small drainage ditches. According to publicly released tender information, the department’s requirements focused on Dongfeng dual-cab chassis, with mandatory specifications including C1 driver’s license operability, unrestricted blue-plate urban access, and suitability for narrow-street operations. The budget was controlled at approximately RMB 137,000–171,000 per unit, with a planned procurement of two units and a total budget of approximately RMB 285,000–342,000. After comprehensive evaluation, Chengli Special Purpose Vehicle Co., Ltd. was selected, delivering two Dongfeng dual-cab sludge suction trucks based on its mature chassis modification solutions (e.g., CLW5070GSSD6 model). Customer feedback confirms stable performance, effectively resolving local rain-season drainage challenges. This case study will comprehensively examine four key stages—'Tender Preparation → Technical Specification Drafting → Chengli’s Bid Support Documentation Provision → FAQ'—to provide practical, replicable insights into government procurement of sludge suction trucks for other municipal authorities or subdistrict-level environmental maintenance units. II. Pre-Tender Preparation for Government Procurement: How to Accurately Define Sludge Suction Truck Requirements. Prior to drafting tender documents, procuring entities must clearly define the following core elements to avoid blind tendering that may lead to post-award fulfillment difficulties: Chassis Selection: Dongfeng dual-cab chassis are widely favored in municipal applications due to their spacious cab, balanced load capacity, and extensive nationwide service network (Dongfeng chassis covered by national warranty). Blue-license-plate 3-cubic-meter sludge suction trucks (e.g., Chengli’s CLW5070GSSD6, compliant with official announcement standards) meet C1 driver’s license operation requirements and face no urban driving restrictions. Superstructure Configuration: Core components of sludge suction trucks include tank material (Q235 carbon steel or 304 stainless steel recommended), vacuum pump brand (e.g., water-ring or rotary vane type), maximum suction depth (≥6 meters), and discharge method (hydraulic tipping or gravity flow). Per Chengli’s product database, the standard 3-cubic-meter sludge suction truck (announcement model CLW5070GSSD6) features a 3 m³ tank volume, ≥7 m suction depth, and ≤5-minute unloading time. Budget Planning: Based on regional procurement practices, the all-inclusive landed price (including tax) for a blue-license-plate 3-cubic-meter sludge suction truck (with Dongfeng chassis) is approximately RMB 108,000–137,000 per unit in 2026. Procuring entities should reserve an additional RMB 10,000–20,000 per unit for ancillary costs (e.g., transportation, insurance, registration), bringing the total per-unit budget to RMB 114,000–171,000. Supplier Qualifications: Priority should be given to manufacturers holding official MIIT announcements, inclusion in the VAT-exemption list for vehicle purchase tax, and nationwide registration and annual inspection eligibility. As one of China’s largest special-purpose vehicle manufacturers, Chengli Special Purpose Vehicle maintains full regulatory compliance (e.g., 108 official announcement parameters including CLW5070GSSD6) and provides end-to-end bid support throughout the procurement process. Procuring entities may contact Chengli sales manager Zhang Yue