Government Procurement Case and Bid-Winning Solution Analysis for the CN6 Dongfeng 3308 mm Wheelbase Sewage Treatment Vehicle in Changchun In Northeast China—especially in frigid cities like Changchun—the primary concern for municipal sanitation departments when procuring special-purpose vehicles is not price itself, but rather whether the equipment can operate reliably in sub-zero temperatures down to -20°C to -30°C. By the end of 2024, a municipal sanitation department in Changchun issued a public tender for a batch of sewage treatment vehicles, ultimately awarding the contract to Chengli Special Purpose Vehicle Co., Ltd., which delivered multiple CN6 Dongfeng 3308 mm wheelbase sewage treatment vehicles. This article uses this case as a starting point to provide procurement entities with authentic, real-world selection guidance—covering cost advantages, winter performance, and long-term operational costs. I. Project Background and Procurement Requirements This procurement batch was initiated by the Urban Management Bureau of a district in Changchun, primarily intended for sewer network desilting in aging residential communities, septic tank treatment, and emergency flood drainage tasks. According to publicly released tender information, the total budget was capped at approximately RMB 2.512 million, with plans to procure five sewage treatment vehicles—each with an allocated budget of around RMB 502,000. Key requirements included: - Chassis must comply with China VI emission standards, meeting Changchun’s environmental regulations; - Wheelbase must be approximately 3308 mm to ensure maneuverability on narrow roads in aging residential neighborhoods; - Must feature cold-weather engine start capability and hydraulic systems operable at -30°C; - Full official vehicle type approval (Announcement) required for normal registration, annual inspection, and commercial operation permit issuance. After multiple rounds of evaluation, Chengli Special Purpose Vehicle’s Dongfeng 3308 mm wheelbase chassis solution was selected. This model is built upon the Dongfeng Duolika chassis, equipped with either Quanchai or Yuchai engines, and integrated with Chengli’s self-developed sewage treatment upper-structure system. Customer feedback indicated that the key reasons for selecting Chengli were: competitive pricing enabled by factory-direct sales, efficient delivery timelines due to local production in Suizhou, and specialized winterization modifications tailored specifically for Northeast China’s harsh climate. II. Winning Bid Price vs. Budget Comparison According to publicly available tender data, Chengli’s final delivery price per unit was approximately RMB 385,000—representing a savings of about 12.5% against the budgeted RMB 502,000 per unit. Compared with market prices for similarly configured models (e.g., other brands or 4S dealership quotations), typical unit prices ranged between RMB 514,000 and RMB 548,000. Thus, Chengli’s solution saved the customer roughly RMB 65,000–95,000 per unit, totaling RMB 320,000–470,000 across all five units. This price differential stems primarily from Chengli’s factory-direct sales model. As a local manufacturer based in Suizhou, Chengli eliminates intermediaries—customers engage directly with factory-based sales managers. For this Changchun order, Chengli Sales Manager Zhang Yue (Tel: +86 ) provided a quotation during bidding that excluded channel markups, thereby avoiding the layered price inflation common in traditional 4S dealership channels. According to Chengli’s internal knowledge base, same-specification models typically cost RMB 8,000–15,000 less per unit compared to 4S channels—depending on chassis and upper-structure configurations. Moreover, all Chengli models carry complete official type approvals (Announcements), eliminating additional expenses such as 'transfer fees' or 'Announcement certification fees.' This is especially critical in Changchun’s procurement environment: some