Government Procurement Case and Bid-Winning Solution Analysis of the CN6 Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Jiaxing In the municipal sanitation sector, procurement of sewage treatment vehicles directly impacts the effectiveness of urban environmental management. In 2024, a municipal sanitation department in Jiaxing (hereinafter referred to as the 'Jiaxing Entity') planned to procure a batch of CN6-emission-standard sewage treatment vehicles for emergency response and routine maintenance of urban river channels and domestic sewage. After multiple rounds of tendering and comparative evaluation of technical proposals, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli') secured the contract with its Dongfeng 3308 mm wheelbase chassis-based vehicle and full-lifecycle service solution, ultimately delivering six units of the CLW5070GSSD6 model sewage treatment vehicle. This article analyzes the case from a spare parts procurement perspective, covering wear-and-tear component lists, pricing transparency, Chengli’s 24-hour direct shipment service, and comparisons with authorized 4S channel services — providing reference insights for similar procurement projects. I. Procurement Background and Requirements Analysis The Jiaxing Entity’s core procurement requirements included: First, vehicles must comply with CN6 emission standards to ensure environmentally compliant operation within urban areas; Second, the chassis wheelbase must accommodate narrow streets and complex terrain — the Dongfeng 3308 mm wheelbase (approx. 3308 mm) was therefore selected as optimal; Third, sewage treatment capacity must support routine cleaning, suction, and preliminary purification functions; Fourth, post-purchase operational costs must remain controllable — especially regarding ease of replacement and price transparency for wear-and-tear components. According to publicly released tender information, the unit budget was capped at approximately RMB 283,000 per vehicle, with a total project budget of about RMB 1.7 million. During the bidding process, Chengli’s proposal was based on the CLW5070GSSD6 model listed in the Ministry of Industry and Information Technology (MIIT) announcement, featuring a Dongfeng Dolika chassis equipped with a CN6-compliant engine and an integrated tank-type sewage treatment system with approx. 5.5 m³ capacity, self-priming sewage pump, and filtration system. This configuration directly addressed the Jiaxing Entity’s three critical requirements: high maneuverability, low emissions, and ease of maintenance. II. Wear-and-Tear Component List and Pricing Transparency For sewage treatment vehicles, the frequency of wear-and-tear component replacement significantly affects long-term operating costs. In this project, Chengli proactively provided a detailed wear-and-tear component list along with reference pricing — ensuring the procuring entity could 'purchase with clarity and operate with confidence.' Below is a summary of common wear-and-tear components compiled from Chengli’s product database and FAQ knowledge base: Table 1: CLW5070GSSD6 Sewage Treatment Vehicle Wear-and-Tear Component List (Based on Chengli’s Public Information) Wear-and-Tear Component Name | Specification/Model | Reference Unit Price (RMB) | Replacement Interval (Months) | Remarks ---|---|---|---|--- Sewage Pump Seal Ring | Φ50 mm rubber | Approx. 80–120 | 6–12 | Adjustment required based on water hardness Filter Mesh Assembly | Stainless Steel 304 | Approx. 350–500 | 12–18 | Cleanable and reusable Hydraulic Oil Hose | High-pressure steel-wire reinforced type | Approx. 200–350/meter | 24–36 | Requires periodic inspection for aging Suction Hose | DN100 mm | Approx. 150–250/meter | 12–24 | Abrasion-resistant material Vacuum Pump Blades | Composite material | Approx. 600–900/set | 18–24 | Avoid dry running Manhole Gasket for Tank Body | Silicone | Approx. 120–180 | 24–36 | Corrosion-resistant design