Government Procurement Case of a 3308-Yellow-Plate Sewage Treatment Vehicle in Xuchang: A Practical Interpretation from Vehicle Selection to Delivery. In the municipal sanitation sector, procurement of sewage treatment vehicles often faces the dual challenge of meeting stringent emission standards while controlling budget constraints. This article takes as its basis a real-world case—the procurement of 3308-yellow-plate sewage treatment vehicles by a municipal sanitation department in Xuchang (hereinafter referred to as 'the client'). Starting from their initial procurement experience, it analyzes key selection pain points and interprets Chengli Special Purpose Vehicle’s upgraded solution and delivery outcomes. The vehicle model involved is the Chengli CLW5180GSSD6 series and related models (parameters sourced from the Ministry of Industry and Information Technology’s official announcement), aiming to provide reference for similar procurement entities. I. Initial Procurement Experience: Challenges from Selection to Trial Use The client is located in Central China and oversees multiple sewage treatment stations. Its aging fleet no longer complies with China VI emission standards or meets daily operational requirements. In early 2025, the client initiated its first procurement round, planning to acquire three yellow-plate sewage treatment vehicles, with a budget capped at approximately RMB 571,000 (per publicly available tender information). During the initial procurement, based on market research, the client selected a vehicle built on a chassis from a certain brand (non-Chengli), priced at around RMB 160,000 per unit (per local procurement practice). However, practical use revealed several issues: • Insufficient Power: The 3308-chassis (wheelbase: 3308 mm) was equipped with an underpowered engine, resulting in noticeable power loss when fully loaded with ~8 m³ of sewage—especially during uphill climbs or long-distance transport. • Low Wastewater Treatment Efficiency: The original vehicle’s wastewater purification system had a capacity of only ~10 tons/hour, failing to meet urgent operational demands during peak periods. • High Maintenance Costs: The chassis and upper-body assembly were supplied by different vendors, requiring separate coordination for repairs—leading to fault response times exceeding 48 hours and disrupting operational continuity. The client reported: “We spent nearly RMB 20,000 on repairs alone within six months—and missed multiple emergency assignments.” This directly prompted them to reassess suppliers for subsequent procurements. II. Identifying Shortcomings: Clarifying Upgrade Requirements Based on the operational shortcomings of the initial batch, the client launched its second procurement round at the end of 2025, clearly defining the following upgrade requirements: • Power Enhancement: The 3308 chassis must be paired with a higher-output engine compliant with China VI emission standards, capable of sustaining full-load operation. • Enhanced Treatment Capacity: The sewage treatment system must achieve ≥15 tons/hour processing capacity and include automatic backwashing functionality. • Integrated Service Support: Both chassis and upper-body assembly must be supplied by the same manufacturer, enabling nationwide chassis warranty coverage plus lifetime upper-body service. • Budget Control: Unit price capped at ~RMB 200,000 (per publicly available tender information), inclusive of transportation, commissioning, and operator training. After comprehensive evaluation, the client focused its attention on Chengli Special Purpose Vehicle Co., Ltd. As one of China’s largest special-purpose vehicle manufacturers (per internal corporate knowledge base), Chengli maintains a product database of 946 models across 44 categories. Its 3308-yellow-plate sewage treatment vehicle (model CLW5180GSSD6, etc.) fully satisfies both official announcement parameters and after-sales service requirements. III. Choosing Chengli Aga