Government Procurement Case and Bid Winning Solution Analysis for Qujing's China VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle — On the eve of the Spring Festival 2025, a municipal sanitation department in Qujing City launched a procurement project for sewage treatment vehicles meeting China VI emission standards to cope with the peak demand for urban sewage treatment during the holiday period. The project budget was approximately RMB 2.008 million, with plans to procure three vehicles to ensure emergency sludge removal and sewage transfer operations at wastewater treatment stations during the Spring Festival. Following open tendering and comprehensive evaluation, Chengli Special Purpose Vehicle Co., Ltd. delivered three sewage treatment vehicles built on the Dongfeng 3308 mm wheelbase chassis, each priced at approximately RMB 600,000 (based on publicly available tender information). This article provides an in-depth analysis of this case, covering holiday support missions, vehicle availability rates, emergency fault response, and common issues. I. Project Background and Requirements Analysis Qujing City is located on the Yunnan-Guizhou Plateau, where the urban sewer network system is relatively outdated. Particularly during special periods such as the Spring Festival and flood season, pressure on sewage treatment surges significantly. The procured sewage treatment vehicles were required to meet the following core specifications: Emission Standard: China VI compliance, aligned with current environmental protection policies, ensuring zero pollution risk during urban operations. Chassis Configuration: Dongfeng 3308 mm wheelbase chassis, offering excellent load-bearing capacity and off-road mobility, suitable for urban roads and surrounding township roads in Qujing. Functional Requirements: Vehicles must be capable of sewage suction, transportation, preliminary treatment (solid-liquid separation), and automated unloading—enabling rapid response to emergency tasks. Delivery Timeliness: Delivery within 15 days after contract signing to ensure license plate registration and operator training prior to the Spring Festival. After-Sales Support: Nationwide chassis warranty; lifetime service coverage for the superstructure; spare parts dispatched within 24 hours. In accordance with local procurement practices, the project adopted open tendering, with evaluation criteria weighted as follows: technical specifications (40%), price (30%), after-sales service (20%), and enterprise qualifications (10%). Chengli Special Purpose Vehicle secured the bid with the highest overall score, leveraging its fully certified product models (e.g., CLW5070GSSD6), transparent configuration details, and a robust after-sales service system. II. Vehicle Availability Rate During Holiday Support Missions During the Spring Festival, daily sewage treatment volume at a certain wastewater treatment station in Qujing surged by 50%, compounded by frequent blockages in aging pipelines, resulting in numerous emergency assignments. Over the intensive 17-day support period (January 25 – February 10, 2025), the three Chengli-supplied sewage treatment vehicles achieved the following availability rates: Table 1: Availability Rate Statistics for Holiday Support Missions (January 25 – February 10, 2025) Vehicle ID | Planned Operating Days | Actual Operating Days | Availability Rate | Primary Mission CLW-01 | 17 | 16 | 94.1% | Sludge removal at urban wastewater treatment stations CLW-02 | 17 | 17 | 100% | Emergency sewage transfer CLW-03 | 17 | 15 | 88.2% | Pipeline cleaning support Total | 51 | 48 | 94.1% | — Data indicates that the average vehicle availability rate across all three units reached 94.1%, with CLW-02 achieving full attendance without any downtime due to vehicle failure. CLW-03 experienced one incident involving a punctured tire; however, after replacing the spare tire, operations resumed within two hours, causing no disruption to schedu