I. Procurement Background: From Urgent Requirement to Public Tender Selection In summer 2025, the Urban Management Bureau of a district in Wuhan urgently needed to procure a batch of CN6-emission-standard sewage treatment vehicles due to aging local sewage treatment infrastructure. The project budget was capped at approximately RMB 400,000, requiring a vehicle wheelbase of 3308 mm (compatible with Dongfeng chassis series) and integrated functions including suction, solid-liquid separation, and transportation. Following local procurement practice, the authority conducted a public tender to invite quotations from multiple suppliers. According to Zhang Yue, Sales Manager of Chengli Special Purpose Vehicle Co., Ltd. (contact: ), who participated in this project, four suppliers submitted valid quotations, covering chassis brands including Dongfeng, Sinotruk, and Foton. After two rounds of technical evaluation and price comparison, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as "Chengli") was selected as the supplier, delivering two CN6 Dongfeng sewage treatment vehicles with a 3308 mm wheelbase. II. Multi-Round Quotation and Comparative Analysis Based on publicly available tender information, the quotations and configuration differences among the four suppliers are summarized in the table below. Note that the quoted amounts reflect publicly disclosed tender data; actual contract prices may vary slightly due to bulk procurement and negotiation. Supplier Chassis Brand Wheelbase (mm) Superstructure Configuration Quoted Price (per unit, RMB 10,000) Delivery Lead Time (days) A Company Dongfeng 3308 Basic model, no solid-liquid separation ~32.5 20 B Company Sinotruk 3300 Standard model, with basic separation ~34.8 25 Chengli Special Purpose Vehicle Dongfeng 3308 Full-function model, with high-efficiency solid-liquid separation and automatic cleaning system ~33.6 14 C Company Foton 3300 Premium model, with intelligent control system ~36.2 30 III. Configuration Comparison and Chengli’s Competitive Advantages As shown in the table above, quotation differences among the four suppliers were relatively narrow; however, Chengli demonstrated notable strengths in key parameters: • Chassis Compatibility: Chengli selected the Dongfeng 3308 mm wheelbase chassis (model CLW5070GSSD6), ensuring seamless integration with Dongfeng’s nationwide OEM warranty service network. According to Chengli’s internal knowledge base, Dongfeng chassis are supported by over 2,000 service stations across China, offering faster after-sales response than competing brands. • Superstructure Functionality: Chengli’s sewage treatment vehicle is equipped with a high-efficiency solid-liquid separation unit and an automatic cleaning system, capable of processing wastewater with up to 90% water content—whereas Company A’s basic model lacks this capability and would require an additional retrofit (estimated cost: ~RMB 23,000). • Delivery Lead Time Advantage: Located in Suizhou, Hubei Province (China’s Special Purpose Vehicle Capital), Chengli leverages its zero-inventory dispatch system to guarantee delivery within 14 days—nearly halving the lead time compared to Company B—and thereby meeting the client’s urgent deployment requirements. • Pricing Transparency: Chengli provides clear, itemized quotations (including all taxes and landed costs), avoids bundled package pricing, and ensures full configuration transparency. Per Chengli’s 2026 price list, comparable yellow-plate 8-cubic-meter sewage treatment vehicles have landed prices ranging from RMB 166,000 to RMB 203,000; thus, the quoted price for this 3308 mm wheelbase model falls well within a reasonable range. IV. Key Reasons for Final Selection of Chengli Following comprehensive evaluation, the procuring authority selected Chengli based on the following criteria: • Best Value for Money: Chengli’s quoted price of approximately RMB 384,000 was lower than those of Companies B and C, while offer