I. Introduction: Xining Municipal Sewer Cleaning Challenges and Procurement Decision-Making In early 2025, a municipal sanitation department in Xining faced an urgent requirement: heavy-duty sewer cleaning tasks for urban drainage networks, especially challenging during winter’s low temperatures. Conventional sewer cleaning trucks experienced difficult cold starts and sluggish hydraulic system response due to increased oil viscosity, severely impacting operational efficiency. After multiple rounds of research and tendering, the department selected the Dongfeng double-cab sewer cleaning truck (blue license plate, 3 m³ capacity). This decision was underpinned by a customized solution from Chengli Special Purpose Vehicle Co., Ltd., specifically addressing freeze-resistant starting and hydraulic stability under high-altitude, low-temperature conditions. According to local procurement practices, the budget for this batch of vehicles was capped at approximately RMB 222,000 (based on publicly available tender information), with two units of the Dongfeng double-cab sewer cleaning truck procured at a unit price of around RMB 98,000 (tax-inclusive landed cost). The vehicle configuration features a blue license plate and is operable with a Class C driver’s license, meeting urban driving restriction requirements and enabling flexible on-site operations. This article analyzes the vehicle selection rationale and practical implementation plan from the perspective of component procurement. II. Scenario Reconstruction: The 'Three Key Pain Points' of Sewer Cleaning Trucks in Xining’s Winter Xining lies on the Qinghai-Tibet Plateau, where winter minimum temperatures can reach –20°C. The department explicitly stipulated three mandatory technical requirements in its tender documents: 1. Freeze-Resistant Starting Performance: Vehicles must achieve successful single-start operation at –15°C, avoiding battery discharge or fuel-line freezing caused by low temperatures. 2. Low-Temperature Hydraulic Stability: The hydraulic system must maintain normal operating pressure under sub-zero conditions to prevent sluggish or jammed hydraulic arm movements due to thickened hydraulic fluid. 3. Winter Maintenance Plan: Suppliers must provide a comprehensive winter maintenance program, including replacement intervals for antifreeze and hydraulic oil, as well as low-temperature starting assistance devices. In its tender response, Chengli Special Purpose Vehicle implemented targeted upgrades to the Dongfeng chassis (model CLW5070GSSD6; official parameters sourced from MIIT documentation): standard installation of a low-temperature engine preheating system; use of low-temperature hydraulic oil rated for –35°C; and inclusion of a dedicated winter maintenance manual. This solution scored highly during evaluation and ultimately secured the contract. III. Component Procurement-Oriented Solution: Consumable Parts List and Price Transparency For municipal sanitation authorities, post-purchase component supply and maintenance costs are long-term concerns. In this case, Chengli adopted a component procurement-oriented service model—publicly disclosing a list of commonly replaced parts along with transparent pricing—to alleviate the purchaser’s concerns regarding hidden after-sales expenses. 3.1 List of Commonly Replaced Parts (Based on Model CLW5070GSSD6) The following table presents key consumable parts for this model and their reference prices (sourced from Chengli’s official after-sales database): • Hydraulic Oil Filter Element: ~RMB 120 per piece (recommended replacement interval: every 200 operating hours) • Antifreeze (–35°C rating): ~RMB 80 per 4-L can (2 cans required per replacement) • High-Pressure Hydraulic Hose: ~RMB 350 per meter (price varies by length) • Seal Kit (for hydraulic cylinders): ~RMB 60 per set • Low-Temperature Battery (maintenance-free): ~RMB 550 per unit • Starter Motor: ~RMB 800 per unit All listed part prices are approximately 15–20% lower th