Case Study and Bid Solution Analysis: Weihai Municipal Government Procurement of Dongfeng Dual-Cab Sludge Suction Trucks (Blue License Plate, 3 m³ capacity) In municipal sanitation, sludge suction trucks are critical equipment for pipeline unclogging and sediment removal. In 2024, a municipal sanitation department in Weihai City, Shandong Province, procured five Dongfeng dual-cab sludge suction trucks (blue license plate, 3 m³) via public tender, with final delivery by Chengli Special Purpose Vehicle Co., Ltd. This project not only resolved drainage blockages in local aging residential communities but also provided a replicable procurement model for neighboring provinces and cities. This article provides an in-depth analysis of the winning bid solution, covering background context, key selection criteria, cross-regional replication strategies, and common issues. I. Project Background: Sludge Removal Challenges in a Weihai District A district in Weihai faces frequent urban flooding during rainy seasons due to aging pipelines. Its existing vacuum trucks proved inefficient and unable to operate effectively in narrow alleys. In June 2024, the department issued a procurement notice specifying the need for five blue-license-plate sludge suction trucks—requiring C1 driver’s license eligibility, excellent maneuverability, integrated high-pressure cleaning capability, and a budget of approximately RMB 343,000–350,000 (per publicly available tender information). After multiple rounds of evaluation, Chengli Special Purpose Vehicle Co., Ltd. won the bid with its integrated Dongfeng chassis + upper-body solution. The estimated unit price was around RMB 60,000–70,000 (based on local procurement conventions). The delivered vehicle model is the Chengli CLW5070GSSD6 sludge suction truck, modified on a Dongfeng dual-cab chassis. It carries full official certification and is eligible for registration nationwide. Customer feedback states: “The vehicle is easy to operate—workers become proficient after just two days of training. The high-pressure pump delivers strong pressure, and the 3 m³ tank capacity is sufficient; it can even access narrow residential alleyways.” This batch has been in operation for six months, with low maintenance frequency and rapid after-sales response. II. Key Selection Criteria: Why the Dongfeng Dual-Cab, Blue-License-Plate, 3 m³ Configuration? Based on Chengli’s product database (e.g., model CLW5070GSSD6), blue-license-plate sludge suction trucks offer the following advantages: • Driver Licensing Requirement: Blue-license-plate classification allows operation with a C1 driver’s license, lowering staffing barriers. • Maneuverability: Overall vehicle length ≤ 6 meters and small turning radius enable effective operation in aging residential neighborhoods and narrow backstreets. • Tank Capacity: A 3 m³ (≈3,000 L) tank enables cleaning of 2–3 manholes per single operation—significantly more efficient than conventional vacuum trucks. • Chassis Reliability: Dongfeng dual-cab cab accommodates 2–3 personnel; the chassis enjoys nationwide warranty coverage and reliable after-sales support. • Emission Standard: Fully compliant with China VI emission standards, meeting Shandong Province’s environmental requirements. III. Cross-Regional Replication: From Weihai to Other Cities in Shandong Province The success of the Weihai case attracted attention from adjacent provinces and cities. For example, in late 2024, the Urban Management Bureau of a district in Yantai City planned to procure six similar sludge suction trucks. Drawing upon the Weihai model, their tender documents explicitly specified requirements including “Dongfeng chassis, blue license plate, 3 m³ tank capacity, and integrated high-pressure cleaning function,” and established evaluation criteria as follows: price (30%), technical specifications (40%), after-sales service (20%), and past performance (10%). Chengli’s extensive delivery record across Shandong Province gav