From Single-Unit Trial to Batch Delivery: The Sludge Suction Truck Procurement Journey of a Municipal Sanitation Department in Urumqi. At the end of 2024, a municipal sanitation department in Urumqi (hereinafter referred to as the 'Purchaser') launched a specialized procurement program for urban drainage pipeline sludge removal equipment. Considering local winter temperatures frequently dropping below -25°C, narrow urban roads, and densely packed alleys, the Purchaser explicitly stipulated three core requirements: blue license plate eligibility (drivable with Class C driver’s license), a 3-cubic-meter tank capacity, and reliable cold-weather starting and operational performance. After multiple rounds of open tendering and technical evaluation, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli') delivered the first batch of Dongfeng double-cab blue license plate sludge suction trucks with 3-cubic-meter tanks. According to publicly available tender information, the initial procurement quantity was five units, with unit prices ranging approximately between RMB 110,000 and 130,000. To date, a total of 12 Chengli sludge suction trucks have been delivered to this purchaser, amounting to a cumulative contract value of approximately RMB 1.5 million. This is not a one-off transaction, but rather an ongoing collaboration built upon rigorous real-world winter performance validation. Key Case Data: Procuring Entity: A municipal sanitation department in Urumqi (and its subordinate subdistrict environmental maintenance units) Delivered Model: Dongfeng double-cab blue license plate sludge suction truck (3-cubic-meter tank) Cumulative Deliveries: 12 units Budget Control: In line with local procurement practices, the per-unit budget cap is set at RMB 149,000 Primary Applications: Urban drainage pipe desilting, manhole cleaning, and winter emergency road clearance Why the Dongfeng Double-Cab Blue License Plate 3-cubic-meter Truck? — The Purchaser’s Technical Selection Logic The tender documents issued by Urumqi included a highly specific technical requirement: 'The engine must be equipped with a low-temperature preheating start system; the hydraulic system’s oil circuit must be compatible with -35# low-temperature hydraulic oil; and a cold-start test report verifying successful operation at -30°C must be provided.' This clearly reflects the Purchaser’s stringent focus on 'freeze-resistant starting capability' and 'low-temperature hydraulic system stability.' Chengli’s Dongfeng double-cab blue license plate sludge suction truck (reference announcement model: CLW5040TQYD6 or similar) directly addresses these challenges: Freeze-Resistant Starting: Equipped with an original Dongfeng chassis featuring standard glow plugs and a low-temperature battery, plus an engine intake preheating system—enabling single-attempt cold starts even at -30°C. Prior to delivery, Chengli conducted simulated low-temperature testing to ensure field reliability under actual operating conditions. Low-Temperature Hydraulic Stability: The hydraulic power unit employs low-temperature-resistant seals, and the hydraulic lines are pre-filled with -35# hydraulic oil at the factory. Customer feedback confirms that, during actual winter operations in Urumqi, the hydraulic system has never experienced actuation lag or hose rupture due to oil solidification. Blue License Plate & Class C License Advantages: Overall vehicle length is controlled within 5,995 mm, with a wheelbase of 3,308 mm and a small turning radius—enabling easy access to narrow old-city alleys and underground parking garage entrances/exits for operations. Winter Maintenance Program: A 'Customized' Service Collaboration Between the Purchaser and Chengli Following the delivery of the first five units, Chengli’s after-sales team developed a 'Winter-Specific Maintenance Program' tailored to Urumqi’s climatic conditions—a key factor enabling the subsequent procurement of seven additional u