Case Study and Bid-Winning Solution Analysis of the Dongfeng Double-Cab Blue-Plate Sewage Suction Truck (3 m³) in Yibin Municipal Government Procurement — Real-World Driver Experience Insights In a tender project launched by a municipal sanitation department in Yibin, the Dongfeng double-cab blue-plate sewage suction truck (3 m³) emerged as the primary winning model. After delivery, it is primarily deployed for urban pipeline desilting, drainage ditch cleaning, and emergency rescue operations. This article provides an in-depth analysis of the procurement case from actual drivers’ perspectives—covering operational convenience, ease of operation for C-license holders, and common operational considerations—to serve as a reference for future government procurements. I. Case Background: Procurement Requirements of a Municipal Sanitation Department in Yibin At the end of 2025, a municipal sanitation department in Yibin issued a public tender notice, planning to procure a batch of blue-plate sewage suction trucks for routine maintenance of the urban drainage system and emergency desilting during flood season. The tender documents explicitly specified the following requirements: gross vehicle weight not exceeding 4.5 tons (to comply with blue-plate/C-license driving regulations), effective tank capacity of 3 cubic meters, integrated high-pressure cleaning system, and chassis equipped with a double-cab driver’s compartment (seating capacity for five persons). Following multiple rounds of evaluation, the Dongfeng double-cab sewage suction truck solution provided by Chengli Special Purpose Vehicle Co., Ltd. was successfully awarded the contract. The unit price was approximately RMB 130,000–160,000 (based on publicly available tender information), with a total of five units delivered. II. Real-World Driver Experience: Transitioning from 'Driving a Large Vehicle' to 'Driving a Small Vehicle' We interviewed two drivers responsible for daily operation of these vehicles (both holding C1 driver’s licenses). Previously operating yellow-plate medium-duty sewage suction trucks, their most prominent impression upon first operating the blue-plate models was 'agility'. • Light steering and excellent visibility: The Dongfeng chassis combined with Chengli’s superstructure features a double-cab driver’s compartment offering superior forward and side visibility compared to single-cab models, significantly reducing blind spots. During operations in narrow alleys of Yibin’s historic urban district, frequent reversing and turning maneuvers are no longer required. • Responsive powertrain: Equipped with either a Quanchai or Yunnan Yunei engine (e.g., model CLW5040TQZD6, built on the Dongfeng DOLICA chassis), delivering approximately 85–95 kW output, the vehicle demonstrates prompt acceleration response without lag. Even when fully loaded with 3 m³ of sludge (approaching the maximum gross vehicle weight of ~4.5 tons), its hill-climbing capability remains sufficient. • Intuitive superstructure operation: The tank employs a hydraulic lifting self-dumping design, enabling drivers to complete unloading operations entirely from inside the cab. One driver remarked: “Previously, unloading required getting out of the vehicle and manually operating controls; now it’s one-button operation—much less physically demanding.” A driver with ten years’ experience added: “This vehicle drives like an SUV—far more controllable than expected, especially during reverse parking. Its rearview mirror visibility is excellent, eliminating concerns about scraping adjacent flower beds.” III. Operational Convenience and Ease-of-Use for C-License Holders: Effortless Operation Even for Novices According to official technical specifications provided by Chengli (e.g., model CLW5040TQZD6), the vehicle’s curb weight is approximately 2.8 tons, and its gross vehicle weight is 4.495 tons—fully compliant with blue-plate classification standards. In practical operation, drivers holding on