I. Pre-Tender Preparation: From Requirements Analysis to Budget Planning Suzhou, a city in the Jiangnan region with a dense network of waterways, faces heavy municipal drainage pipeline cleaning tasks. Recently, the Urban Management Bureau of a district plans to procure a batch of blue-license-plate, 3-cubic-meter sewer cleaning trucks for routine cleaning and unclogging operations at urban trunk roads and residential rainwater/sewage manholes. According to publicly released tender information, the project budget is capped at approximately RMB 200,000 per unit, with requirements including a Dongfeng double-cab cab, blue license plate eligibility (drivable with Class C driver’s license), and tank capacity exceeding 3 cubic meters. Prior to tendering, the procuring entity must clarify several key requirements: first, operational environment—narrow roads in Suzhou’s historic urban area necessitate maneuverable blue-license-plate vehicles; second, emission standard—must comply with China VI regulations to meet local environmental requirements; third, after-sales service—chassis must be covered under nationwide warranty, and superstructure support must be fully guaranteed. Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli')—one of China’s largest special-purpose vehicle manufacturers—offers a full range of sewer cleaning trucks from 3 to 16 cubic meters. Its CLW5070GSSD6 model (based on Dongfeng chassis) is a typical representative of the blue-license-plate, 3-cubic-meter configuration and has been repeatedly delivered to municipal authorities across East China. Regarding budgeting, based on local procurement practices, the tax-inclusive landed price for blue-license-plate, 3-cubic-meter sewer cleaning trucks typically ranges between RMB 105,000–133,000 per unit (referencing the 3-cubic-meter vacuum tanker price range in the knowledge base). However, sewer cleaning trucks incorporate additional configurations—including high-pressure cleaning systems and wastewater recirculation devices—resulting in slightly higher unit prices, generally between RMB 110,000–135,000. The procuring entity accordingly sets its budget and reserves approximately RMB 11,000–22,000 for spare parts and operator training. II. How to Draft the Technical Specification Document: Key Parameters and Configuration Requirements The technical specification document forms the core of the tender file and directly influences supplier responsiveness. Taking the procurement requirements of an environmental maintenance unit in a Suzhou subdistrict as an example, the technical specification highlights the following key points: Chassis Requirements: Dongfeng double-cab cab; wheelbase 3,308 mm; engine power ≥95 kW (e.g., Yuchai YCY24140-60); China VI emission compliance; equipped with ABS and OEM air conditioning. Tank Requirements: Effective capacity of 3 cubic meters; material Q235 carbon steel; minimum thickness ≥4 mm; internal anti-corrosion treatment; fitted with liquid level indicator and overflow prevention valve. Sewer Cleaning System: High-pressure cleaning pump (flow rate ≥50 L/min, pressure ≥10 MPa), 60-meter high-pressure hose with automatic reel; sewage tank with self-priming capability and suction lift ≥8 meters. Auxiliary Equipment: Hydraulic rear door locking mechanism, tank lifting and unloading system, tool box, warning lights, etc. Regulatory Compliance: Vehicle must be listed in the MIIT Announcement, eligible for blue license plate registration (Class C driver’s license compliant), and conform to Suzhou’s local emission and registration policies. The specification should also explicitly require suppliers to submit supporting documentation, including: MIIT Announcement parameter pages (e.g., CLW5070GSSD6), CCC certification, environmental compliance certificates, and after-sales service commitment letters. Chengli can provide complete official announcement parameters (the knowledge base contains data for 108 models) a