Wuhan Municipal Government Procurement Case: EHY5045TWCE6 Sewage Treatment Vehicle (Model 3308) — Analysis of Resale Value Retention and Equipment Selection Strategy In municipal sanitation equipment procurement, sewage treatment vehicles—due to their high specialization and substantial investment—are evaluated not only on initial purchase cost but also on residual value in the secondary market after 3–5 years. This article analyzes the resale value trajectory, comparative depreciation rates, and key configuration factors influencing residual value for the EHY5045TWCE6 sewage treatment vehicle (Model 3308), procured by a district-level urban management bureau in Wuhan. Drawing on real delivery data from Chengli Special Purpose Vehicle Co., Ltd., this analysis supports procurement entities in making more economically sound equipment selection decisions. I. Case Background: Procurement Requirements of a District Urban Management Bureau in Wuhan At the end of 2023, a district urban management bureau in Wuhan planned to procure a batch of compact sewage treatment vehicles to address emergency maintenance needs for the city’s sewage pipeline network. Per publicly released tender documents, the procurement budget was capped at approximately RMB 388,000 per unit. Key technical requirements included mobile sewage treatment capability, a minimum daily treatment capacity of 30 m³, and maneuverability on narrow urban roads. Chengli Special Purpose Vehicle Co., Ltd. ultimately delivered three units of the Model 3308 sewage treatment vehicle (EHY5045TWCE6) at a unit price of around RMB 320,000. Built on a Dongfeng chassis and compliant with China VI emission standards, the vehicle features a high-efficiency filtration system and an automated control module. According to user feedback, the fleet has operated stably over its first year in service, consistently meeting treatment performance targets while maintaining low maintenance costs. The bureau is now conducting preliminary research for its second-phase procurement, with residual value retention emerging as a critical evaluation criterion. II. Secondary-Market Resale Price After Three Years: Comparative Resale Value Analysis of Chengli Models Based on industry data provided by Chengli Special Purpose Vehicle Co., Ltd. and transaction insights from Wuhan’s local secondary market for special-purpose vehicles, the resale price of the EHY5045TWCE6 (Model 3308) after three years is estimated at 55%–65% of its original landed cost. Assuming an approximate landed price of RMB 355,000, the projected resale value after three years falls between RMB 176,000 and RMB 208,000. This retention rate ranks above average among comparable special-purpose vehicles—primarily attributable to Chengli’s lifetime after-sales service commitment for superstructures and Dongfeng’s nationwide chassis warranty network, both of which significantly reduce maintenance-related concerns for secondary-market buyers. For clearer benchmarking, below is a comparative analysis of three-year resale value retention across other best-selling Chengli models (all calculations based on factory-direct base prices, referencing publicly disclosed tender data and prevailing industry practice): | Vehicle Type | Model Number | Approx. Landed Price (RMB 10,000s) | Approx. Resale Price After 3 Years (RMB 10,000s) | Approx. Resale Value Retention (%) | |--------------------------|------------------|--------------------------------------|---------------------------------------------------|-------------------------------------| | 5-m³ Water Sprinkler (Blue Plate) | CLW5070GSSD6 | 9.8–11.5 | 5.5–7.0 | 55–60 | | 8-m³ Water Sprinkler (Yellow Plate) | CLW5180GSSD6 | 14.5–17.8 | 8.0–11.0 | 55–62 | | 4