I. Case Background and Operational Requirements In 2024, a municipal sanitation department launched a public procurement initiative for sludge suction trucks to support the renovation of aging urban drainage networks within its jurisdiction. The vehicles are intended for routine pipe cleaning and emergency response operations. Key operational areas include narrow alleys, zones surrounding farmers’ markets, and school entrances—locations requiring high maneuverability, excellent passability, and efficient sludge removal capability. After extensive research and comparative evaluation, the Dongfeng single-cab blue license plate sludge suction truck with 5-cubic-meter capacity was selected and delivered. This model excels in light-duty municipal applications, and customers reported: “It can enter residential communities, pass under height-restricted barriers, and rapidly load and transport sludge,” effectively resolving longstanding issues such as large vehicles’ inability to access confined spaces and low efficiency of manual cleaning. II. Operational Matching and Vehicle Model Selection Analysis The procurement requirements cover three typical operational scenarios: light-duty municipal (old residential neighborhoods, narrow alleys), heavy-duty industrial (industrial parks, main roads), and special-purpose operations (emergency response, flood prevention during rainy seasons). Below are recommended specifications and Chengli’s tailored solutions for each scenario: 1. Light-Duty Municipal Operations (Old Residential Neighborhoods, Narrow Alleys) Recommended Specifications: Blue license plate; wheelbase of 2,800–3,300 mm; tank capacity of 5–6 cubic meters; engine power of 80–100 kW; optional hydraulic stabilizing legs or folding boom. Chengli Solution: Dongfeng single-cab chassis (e.g., model CLW5070GSSD6), based on Dongfeng Duolika or Furika chassis, compliant with China VI emission standards, with a wheelbase of approximately 3,300 mm and vehicle width