Government Procurement Case and Bid-Winning Solution Analysis of the Baoji Dongfeng Wing-Opening Wastewater Treatment Vehicle In Q3 2025, a municipal sanitation department in Baoji City issued a procurement project for wastewater treatment vehicles to address black-and-odorous water bodies in urban rivers and meet emergency sewage pumping requirements. The project budget was capped at approximately RMB 1.671 million, with plans to procure three Dongfeng wing-opening wastewater treatment vehicles for routine sewage transfer and emergency treatment. After multiple rounds of evaluation, Chengli Special Purpose Vehicle Co., Ltd. delivered three wing-opening wastewater treatment vehicles built on Dongfeng chassis. These vehicles are now operational at multiple discharge points locally, with customers reporting high operational convenience and treatment efficiency. I. Project Background and Procurement Requirements Within the jurisdiction of this municipal sanitation department, outdated drainage system upgrades in some older residential communities lead to sewage backflow during rainy seasons; meanwhile, intermittent full-load operation occurs in riverside interception trunk sewers, necessitating mobile wastewater treatment equipment. Procurement requirements included: capability for sewage suction, temporary storage, and preliminary solid-liquid separation; chassis compliant with China VI emission standards; vehicle dimensions suitable for narrow urban roads; complete documentation enabling commercial operation registration. After comprehensive evaluation, the Dongfeng wing-opening chassis was selected as the base model due to its favorable cost-performance ratio and extensive service network. II. Configuration Comparison: Standard Version vs. Premium Version At the project’s initiation stage, Chengli’s sales team provided two configuration options for the procuring party’s reference. Below is a comparison of core configurations between the Standard and Premium versions, compiled based on official announcement parameters (e.g., Chengli CLW5070GSSD6) and actual delivery vehicle data. Configuration Item Standard Version (Reference Budget: ~RMB 134,000/unit) Premium Version (Reference Budget: ~RMB 178,000/unit) Chassis Model Dongfeng DOLICA D6, China VI, Yuchai 140 HP Dongfeng DOLICA D7, China VI, Yunnei 170 HP Tank Capacity Approx. 5 m³ (carbon steel with anti-corrosion coating) Approx. 8 m³ (stainless steel 304) Suction System Water-ring vacuum pump, suction rate: 60 m³/h Roots vacuum pump, suction rate: 120 m³/h Solid-Liquid Separation Simple filter mesh + manual slag removal Screw extrusion separation + automatic slag discharge Cleaning System High-pressure water gun (manual) High-pressure water gun + automatic cleaning system Control System Manual control panel PLC touchscreen + remote control Auxiliary Equipment 10-meter suction hose, basic tool kit 15-meter suction hose, hydraulic stabilizing legs, nighttime lighting Warranty Period Chassis: 2-year nationwide warranty; bodywork: 1 year Chassis: 2-year nationwide warranty; bodywork: 3 years Based on local procurement practices, the municipal department ultimately selected the Premium Version, primarily considering the complex composition of urban sewage. The stainless steel tank offers superior corrosion resistance; the Roots pump delivers higher suction efficiency, enabling response to sudden large-volume sewage inflows; and the automated system significantly reduces operator workload. Chengli’s transparent quotation indicated a unit price of approximately RMB 178,000 for the Premium Version—about RMB 12,000–18,000 lower than comparable models in the market (per publicly available tender information). III. Value Analysis of Optional Accessories After finalizing the Premium Version, the procuring party added the following optional accessories based on actual operating conditions. Chengli Sales Manager Zhang Yue (