Government Procurement Case and Bid-Winning Solution Analysis for the Baoji 3308 Yellow-Plate Sewage Treatment Vehicle In the municipal environmental protection sector, procurement of sewage treatment vehicles often involves multiple dimensions including budget control, long-term operation & maintenance, and residual value retention. In 2024, a municipal sanitation department in Baoji (hereinafter referred to as the 'Baoji client') procured a batch of yellow-plate 3308 sewage treatment vehicles for urban black-and-odorous water body remediation and emergency sewage discharge. Based on publicly available tender information and Chengli Special Purpose Vehicle Co., Ltd.’s actual delivery case, this article provides an in-depth interpretation of the project’s solution design, vehicle model selection, residual value analysis, and key configuration considerations — offering reference for similar procurement initiatives. I. Project Background and Requirements The Baoji client faces two primary challenges: frequent blockages in aging drainage pipelines and urgent post-rainstorm sewage handling during flood seasons. This procurement targets yellow-plate 3308 sewage treatment vehicles meeting China VI emission standards for chassis, with high-efficiency suction and solid-liquid separation capabilities, and controllable long-term maintenance costs. Per local procurement practices, the budget is capped at approximately RMB 500,000 per unit, with unit prices ranging between RMB 181,000–249,000 (per publicly disclosed tender data). Chengli Special Purpose Vehicle Co., Ltd. (hereinafter “Chengli”) participated in the tender and successfully delivered three units of the yellow-plate 3308 sewage treatment vehicle. The chassis is based on the Dongfeng D7 series, while the superstructure features Chengli’s proprietary vacuum suction and filtration system. Client feedback states: “Since commissioning, the vehicle has significantly improved treatment efficiency—especially demonstrating stable performance during rainstorm-related emergency operations.” II. Bid-Winning Solution Analysis: Resale Value and Residual Value Retention After 3 Years In the special-purpose vehicle sector, residual value retention directly impacts the procuring entity’s long-term asset value. Industry experience indicates that Chengli’s 3308 yellow-plate sewage treatment vehicle retains approximately 55%–65% of its original landed cost after three years on the used-vehicle market. Basis for Residual Value Calculation: • Landed Cost (New Vehicle): Based on Chengli’s 2026 tax-inclusive landed price, an 8-cubic-meter yellow-plate sewage treatment vehicle (including modification) costs approximately RMB 164,000–201,000; a 15-cubic-meter model costs approximately RMB 240,000–298,000. In this case, the 3308 model (with effective capacity of 8 m³) has a landed cost of roughly RMB 170,000–204,000. • Residual Value After 3 Years: Market transaction prices for comparable used vehicles (in good condition, accident-free) range from RMB 102,000–136,000, translating to a residual value retention rate of ~55%–65%. Comparison with Competitors: Other brands (e.g., Sinotruk or Foton chassis) with equivalent configurations typically exhibit 5%–10% lower residual value retention, primarily due to Chengli’s advantages in lifetime superstructure service support and robust spare parts supply network. Residual Value Comparison Table (Based on Market Research and Chengli Case Data) | Vehicle Configuration | New Vehicle Landed Price (Reference) | Estimated 3-Year Used-Vehicle Price | Residual Value Rate | Key Contributing Factors | |------------------------|----------------------------------------|----------------------------------------|------------------------|---------------------------| | Chengli 3308 Yellow-Plate Sewage Treatment Vehicle (Dongfeng Chassis) | ~RMB 150,000–180,000 | ~RMB 90,000–120,000 | 55%–65% | Lifetime superstructure service, nationwide chassis warranty, readily availa