Baoji National VI Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle: Government Procurement Case and Bid-Winning Solution Analysis In the municipal sanitation sector, procurement of sewage treatment vehicles often faces challenges such as complex vehicle specifications, difficulty verifying announcement compliance, and lack of budget transparency. Recently, a municipal sanitation department in Baoji City, Shaanxi Province, procured a batch of National VI emission-standard sewage treatment vehicles via public tender—with the Dongfeng 3308 mm wheelbase chassis emerging as the primary winning platform. This article uses this case as a starting point and, drawing on Chengli Special Purpose Vehicle Co., Ltd.’s real delivery records, analyzes the end-to-end process—from official announcement verification to bid-winning solution—to provide replicable procurement experience for grassroots units. I. Case Background: Procurement Requirements of a Baoji Municipal Sanitation Department In 2025, the Urban Management Bureau of a district in Baoji City planned to procure two sewage treatment vehicles to enhance local sewer network maintenance capabilities, with a total budget capped at approximately RMB 455,000. Per local procurement conventions, the vehicles were required to meet National VI emission standards; chassis wheelbase must not exceed 3,400 mm; tank capacity must be no less than 5 m³; and the vehicles must be equipped with high-pressure cleaning and vacuum suction functions. After multiple rounds of technical evaluation and price comparison, the sewage treatment vehicle solution offered by Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as “Chengli”)—based on the Dongfeng 3308 mm wheelbase chassis—won the bid, with a unit price of approximately RMB 198,000 (per publicly disclosed tender information). The vehicles were delivered in July 2025 and are currently deployed by an environmental maintenance unit in a subdistrict of Baoji City. Customer feedback indicates that the vehicles operate flexibly in narrow streets and achieve approximately 20% higher sewage treatment efficiency compared to previous models. II. Announcement Verification: How to Confirm Vehicle Compliance? In government procurement, verifying the official vehicle announcement is the first critical step. Taking the Chengli CLW5070GSSD6 sewage treatment vehicle as an example—built on the Dongfeng 3308 mm wheelbase chassis—its official announcement number is listed in the MIIT’s “Announcement of Road Motor Vehicle Manufacturers and Products.” Below are the specific verification steps: 1. Access the MIIT Official Website: Visit the “Road Motor Vehicle Manufacturer and Product Information Query System” (registration or use of a public account required). 2. Enter the Announcement Number: Input the product model “CLW5070GSSD6” into the “Product Model” field; the system will return key parameters including chassis model, engine model, emission standard (National VI), gross vehicle weight, and overall dimensions. 3. Cross-Check Critical Parameters: Specifically verify whether the wheelbase (3,308 mm), tank capacity (5.2 m³), and rated payload (approx. 3 tons) match procurement requirements. 4. Verify Production Consistency: Check whether the “Vehicle Manufacturer Name” is listed as “Chengli Special Purpose Vehicle Co., Ltd.” and whether the “Product Trademark” is “Chengliwei Brand.” Caution is advised: Some non-compliant or “cloned” sewage treatment vehicles exist in the market—for instance, one agency purchased a vehicle advertised as Dongfeng-based, but its actual wheelbase was only 2,800 mm, rendering it ineligible for annual inspection. Therefore, prior to procurement, buyers are advised to request the full official announcement document from the supplier and verify model authenticity through Chengli’s official hotline () or Sales Manager Zhang Yue (). III. Fraudulent Announcement Case: Lessons Learned from Real Procur