I. Case Background: Sewage Suction Truck Procurement Requirement of an Anshan Municipal Sanitation Department In early 2025, a municipal sanitation department in Anshan City (hereinafter referred to as the 'Purchaser') launched a public tender for a batch of small sewage suction trucks. According to the tender notice and internal technical specifications, the core objective of this procurement was to replace outdated, non-compliant emission suction and sewage transport equipment, with a focus on resolving challenges associated with cleaning urban drainage networks, rainwater inlets, and septic tanks. The Purchaser explicitly required vehicles to be blue license plate models (drivable with a Class C driver’s license), equipped with a Dongfeng or equivalent-brand double-cab chassis, and featuring an effective tank capacity of approximately 3 cubic meters, capable of stable operation under Anshan’s low-temperature winter conditions. The tender documents specifically emphasized 'cold-start performance' and 'low-temperature hydraulic system stability'—typical pain points for municipal equipment procurement in northern China. Per local procurement practice, the budget was capped at approximately RMB 400,000 (tax-inclusive landed price). Following multiple rounds of technical proposal evaluation and on-site inspections, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli') was selected as one of the shortlisted bidders—and ultimately awarded the contract—based on its compliant qualifications, mature chassis integration capability, and comprehensive after-sales service plan. Two Dongfeng double-cab blue license plate sewage suction trucks were delivered. This article adopts a 'qualification-review-oriented' framework to analyze the essential qualification checklist required of legitimate manufacturers, explain how to verify production licenses, and—using the Chengli case as a reference—provide procurement entities with actionable insights into successful bidding strategies. II. Essential Qualification Checklist for Legitimate Manufacturers: How Procurement Entities Screen Suppliers In government procurement projects, qualification review serves as the first critical gate. During bid document evaluation, procurement entities typically verify the following core qualifications item-by-item: 1. MIIT Announcement and Exemption from Vehicle Purchase Tax Directory: The vehicle model must be listed in the Ministry of Industry and Information Technology (MIIT)’s 'Announcement of Road Motor Vehicle Manufacturers and Products', and preferably included in the 'Directory of New Energy Vehicles Exempted from Vehicle Purchase Tax' or otherwise eligible for conventional vehicle purchase tax exemptions. Chengli sewage suction trucks (e.g., model CLW5070GSSD6) are all fully announced models, ensuring nationwide registration eligibility and annual inspection compliance. 2. China Compulsory Certification (CCC): Both chassis and complete vehicles must pass CCC certification, verifying compliance with national safety standards. 3. ISO Quality Management System Certification: The manufacturer must hold ISO 9001 or equivalent quality management system certification, demonstrating controlled and standardized production processes. 4. After-Sales Service and Spare Parts Supply Commitment: Bidders must submit detailed after-sales plans, including nationwide chassis warranty coverage, lifetime upfit service commitment, and 24-hour direct spare parts dispatch. Chengli explicitly commits to 'nationwide Dongfeng chassis warranty and lifetime upfit service'—a key contractual assurance highly valued by procurement entities. 5. Proven Track Record in Similar Projects: Bidders must provide verifiable evidence of comparable government procurement contracts executed within the past three to five years, such as award notices, signed contracts, or acceptance reports. Chengli’s knowledge base includes authentic cases like '15 street sweeper