Government Procurement Case and Configuration Scheme Analysis of the National VI Dongfeng Wastewater Treatment Vehicle with 3308 mm Wheelbase in Langfang City — In spring 2026, a municipal sanitation department in Langfang City planned to procure a National VI emission-standard wastewater treatment vehicle to enhance urban sewage treatment efficiency. After comprehensive evaluation and open tendering, Chengli Special Purpose Automobile Co., Ltd. was selected to supply a wastewater treatment vehicle built on the Dongfeng 3308 mm wheelbase chassis. This article analyzes, based on this case, the configuration schemes of the standard and premium versions, the practical value of optional accessories, Chengli’s transparent pricing logic, and addresses common questions regarding government procurement. I. Case Background and Requirements Analysis The municipal sanitation department is primarily responsible for maintaining drainage networks and performing emergency sewage suction and discharge operations across Langfang City’s main urban area. According to local procurement practices, the budget was capped at approximately RMB 393,000. The vehicle had to meet the following core requirements: Chassis Requirements: National VI emission standard; Dongfeng brand; wheelbase of 3308 mm; reliable load-carrying capacity; maneuverable in narrow urban streets. Functional Requirements: Capable of sewage suction, separation, purification, and discharge, with a minimum treatment capacity of 15 m³/hour. Regulatory Compliance: Must possess complete MIIT (Ministry of Industry and Information Technology) announcement documentation, enabling normal registration, annual inspection, and commercial operation licensing. After-sales Service: Nationwide chassis warranty under Dongfeng’s authorized service network; lifetime technical support for the superstructure (upper assembly). After comparing multiple suppliers, Chengli Special Purpose Automobile secured the bid due to its full MIIT announcements, transparent configurations, and short delivery lead time (typically 7–15 days for standard models). II. Comparison of Standard vs. Premium Configuration Specifications Chengli offered two configuration options for this project: the Standard Version, suitable for routine sewage suction and discharge tasks; and the Premium Version, featuring enhanced automation and purification capabilities for complex operating conditions. Below is a comparison of key parameters between the two configurations: Configuration Item Standard Version (Dongfeng 3308 mm Wheelbase) Premium Version (Dongfeng 3308 mm Wheelbase) Chassis Model Dongfeng EQ1075SJ3CDF (National VI) Dongfeng EQ1075SJ3CDF (National VI) Engine Quanchai 115 HP (Q23-115E60) Yuchai 140 HP (YCY24140-60) Wastewater Tank Capacity 4.5 m³ 6.0 m³ Treatment Capacity 15 m³/hour 20 m³/hour Purification System Mechanical Grating + Sedimentation Tank (Manual Cleaning) Automatic Backwash + Flocculation Filtration (Automatic Sludge Discharge) Operation Method Manual Control (Hydraulic Valve Bank) PLC Touchscreen + Remote Control Standard Accessories 10-meter Suction Hose, 1 High-Pressure Cleaning Gun, Warning Light 15-meter Suction Hose, 2 High-Pressure Cleaning Guns, Night Illumination Lights, Tool Box Reference Delivered Price Approx. RMB 280,000–320,000 (per publicly disclosed tender data) Approx. RMB 350,000–380,000 (per publicly disclosed tender data) Considering the complexity of urban sewage composition and frequent repositioning requirements, the municipal department ultimately selected the Premium Version to improve automation levels and treatment efficiency. Mr. Zhang Yue, Chengli Sales Manager (Tel: ), provided detailed parameter-matching recommendations during technical coordination to ensure full compliance with the tender specifications.