The Starting Point of First-Time Procurement: A Challenge from Scratch. In early 2025, the Urban Management Bureau of a district in Changsha received a new assignment: to procure municipal sewage treatment vehicles as part of the environmental infrastructure for a newly built industrial park. This marked the unit’s first foray into specialized vehicle procurement, with no prior experience in this domain. Project leader Director Li recalled: 'We had no concept of vehicle models, configurations, or budgeting—we had to start our research entirely from scratch.' The industrial park hosts primarily small- and medium-sized manufacturing enterprises, generating approximately 200 tons of wastewater per day. The vehicles were required to deliver high-efficiency suction, solid-liquid separation, and emergency treatment capabilities. The budget was capped at approximately RMB 393,000, and based on publicly available tender information, the team initially shortlisted CN6-emission-standard Dongfeng-series chassis models. After comprehensive comparison, Chengli Special Purpose Vehicle Co., Ltd.’s CN6 Dongfeng 3308 mm wheelbase sewage treatment vehicle emerged as a top candidate. Selection Process: Why the Dongfeng 3308 mm Wheelbase? During the selection phase, Director Li’s team visited multiple suppliers and found significant inconsistencies in vehicle specifications across the market. Zhang Yue, Chengli’s sales manager (contact: ), proactively provided end-to-end consultation—from chassis selection to upper-structure configuration—explaining each detail thoroughly. Ultimately, the team selected Chengli’s model CLW5070GSSD6 (built on the Dongfeng 3308 mm wheelbase chassis) as the benchmark for evaluation and made its final decision after comparative analysis against competing products. Key Selection Criteria: Chassis Advantages: The Dongfeng 3308 mm wheelbase chassis (model EQ1075SJ3CDF) is a mature domestic light-duty truck chassis compliant with CN6 emission standards, equipped with an engine delivering approximately 96 kW output—ideal for operation in narrow urban streets. Chengli offers nationwide OEM chassis warranty coverage, ensuring hassle-free after-sales support. Upper-Structure Configuration: Chengli’s sewage treatment vehicle is equipped with a sewage pump (flow rate approx. 60 m³/h), a solid-liquid separation system (processing capacity approx. 5 m³/h), and a liquid storage tank (capacity approx. 3 m³), fully meeting the industrial park’s emergency treatment requirements. Budget Alignment: According to local procurement practices, the all-inclusive landed price of this model ranges from approx. RMB 315,000 to 360,000—well within the budget ceiling. Director Li stated: 'Chengli’s configuration is transparent, with no bundled pricing; we can clearly see the cost breakdown for every component—a critical factor for government procurement.' Comparative Data: Chengli vs. Other Brands Below is a comparison table between Chengli’s CLW5070GSSD6 and another mainstream brand, based on publicly disclosed tender specifications and data provided by Chengli: | Comparison Item | Chengli CLW5070GSSD6 | Competitor A (CN6 Dongfeng Series) | |------------------|------------------------|--------------------------------------| | Chassis Model | Dongfeng EQ1075SJ3CDF (3308 mm wheelbase) | Dongfeng EQ1075SJ3CDF (same chassis type) | | Emission Standard | CN6 | CN6 | | Sewage Pump Flow Rate | ~60 m³/h | ~55 m³/h | | Solid-Liquid Separation Capacity | ~5 m³/h | ~4 m³/h | | Liquid Storage Tank Volume | ~3 m³ | ~2.5 m³ | | Landed Price (Reference) | ~RMB 280,000–320,000 | ~RMB 320,000–360,000 | | Delivery Lead Time | 7–15 days (standard model) | 15–25 days | | Factory-Direct Discount | Saves RMB 8,000–15,000 vs. 4S channels (same configuration) | No explicit discount offered | As shown above, Chengli outperforms competitors in both technical performance and cost-effectiveness. Director Li specifically...