Urgent Demand Context: Rainy-Season Sewer Blockages and Emergency Procurement. In May 2025, a municipal sanitation department in a district of Liuzhou City, Guangxi Province, experienced severe sewer blockages across multiple drainage networks following consecutive heavy rainfall. Traditional manual cleaning proved highly inefficient and posed safety hazards. The department’s existing three large-scale suction trucks—over eight years old with degraded hydraulic systems—were unable to operate effectively in narrow alleys, creating an urgent need for agile, high-efficiency blue-license-plate suction trucks (3-cubic-meter capacity). Per local procurement practice, such emergency projects typically follow an ‘emergency supplementary procurement’ model, bypassing standard tendering procedures and directly soliciting quotations and comparative evaluations from manufacturers capable of immediate delivery. Core Requirements: - Vehicle Type: Blue license plate, drivable with Class C driver’s license; suitable for urban narrow-road operation; - Capacity: 3 cubic meters (tank or sewage tank); - Chassis: Dongfeng double-cab configuration, enabling transport of work crews (1 driver + 3–4 sewer cleaning personnel); - Emission Standard: China VI (fully enforced across Guangxi as of 2025); - Special Requirement: Given Liuzhou’s subtropical humid climate—with relative humidity frequently exceeding 85% during the rainy season—the vehicle must feature anti-corrosion coating rated for over 500 hours in salt-spray testing, and hydraulic sealing components resistant to humid-heat aging. Emergency Tendering Timeline: 3-Day Quotation Solicitation, 5-Day Delivery According to publicly available tender information, the department initiated its emergency procurement process on May 20, 2025, issuing quotation requests exclusively to three specialized vehicle enterprises holding official qualifications, requiring comprehensive proposals for ‘blue-license-plate Dongfeng double-cab 3-cubic-meter sewage suction trucks’ (including chassis model, superstructure specifications, pricing, and delivery schedule). Chengli Special Purpose Vehicle Co., Ltd. (hereinafter “Chengli”) submitted a customized solution based on the CLW5070GSSD6 chassis on May 22, leveraging its localized production in Suizhou and zero-inventory dispatch capability. Key Parameter Comparison: | Item | Chengli Solution (CLW5070GSSD6 Chassis) | Competitor A Solution | Competitor B Solution | |------|----------------------------------------|------------------------|------------------------| | Chassis Brand | Dongfeng Double-Cab (China VI) | Dongfeng Single-Cab | Foton Double-Cab | | Tank Capacity | 3.0 m³ | 2.8 m³ | 3.1 m³ | | Engine Power | 96 kW (130 HP) | 85 kW | 100 kW | | Hydraulic System | Dual-gear pump + anti-corrosion coating | Single-gear pump, no special treatment | Dual-gear pump, no anti-corrosion coating | | Sealing Material | Humid-heat-resistant fluororubber | Standard nitrile rubber | Standard nitrile rubber | | Emission Standard | China VI | China VI | China VI | | Delivery Lead Time | 7–15 days (zero-inventory dispatch) | 30 days | 25 days | | Reference Vehicle Price (RMB) | ~¥115,000 | ~¥128,000 | ~¥132,000 | (Note: Pricing data sourced from publicly disclosed tender information and local procurement norms; actual contract price prevails.) On May 23, after comprehensive evaluation, the department selected Chengli’s proposal. Key decision drivers included: - Delivery Speed: Chengli’s localized Suizhou production enables standard-model delivery within 7–15 days; additionally, three Dongfeng double-cab chassis units were already in stock and ready for modification; - Humid-Heat Adaptability: Chengli’s solution features southern-rainy-season-specific optimizations—including internal tank coating (epoxy resin + zinc-based primer) and external coating (polyurethane topcoat) for enhanced corrosion resistance, plus humid-heat-resistant fluororubber sealing components.