Case Background: Referral from an Existing Customer Drives Procurement Demand. In 2025, a municipal sanitation department in Yantai faced a practical challenge while upgrading its sludge removal capacity: aging vehicles with low transport efficiency and non-compliance with the latest environmental standards. Mr. Wang, the unit’s director, learned through peer exchange that a district urban management bureau in a neighboring city had purchased Chengli Special Purpose Vehicle’s Sinotruk-based sludge self-dumping trucks in 2023—with positive user feedback. Consequently, Director Wang contacted Chengli’s sales manager, Ms. Zhang Yue (Tel: +86 ), to inquire about configuration details and pricing for the 24 m³ model. This trust-based referral chain—'existing customers introducing new customers'—is highly prevalent in the sanitation industry. Ms. Zhang explained that Chengli Special Purpose Vehicle Co., Ltd., headquartered in Suizhou, Hubei Province, serves over 500 municipal sanitation units nationwide; product quality and after-sales reputation are its core competitive advantages. Subsequently, Director Wang organized an internal vehicle selection meeting, focusing on three key criteria: Sinotruk chassis reliability, 24 m³ tank capacity, and China VI emission compliance. Selection & Tendering Process: From Technical Specifications to Implementation Per local procurement practice, the project budget was capped at approximately RMB 341,000 per unit. Director Wang required a stable chassis with full official certification (Announcement), and local registration and annual inspection capability in Yantai. Ms. Zhang provided technical specifications for multiple models from Chengli’s product database—including CLW5180GSSD6 (22 m³) and the dedicated 24 m³ sludge self-dumping variant. After comparative evaluation, the unit selected the solution featuring a Sinotruk HOWO chassis paired with a 24 m³ sludge self-dumping body. Key specifications are as follows: Chassis Brand: Sinotruk (HOWO Series) Total Capacity: 24 m³ Emission Standard: China VI Chassis Model: Reference Sinotruk ZZ5187XXYN711GF1 (subject to official Announcement) Superstructure Configuration: Hydraulic self-dumping system, corrosion-resistant body, sealed cover plate The tender document explicitly stipulated: full Announcement compliance, nationwide registration eligibility, and minimum 2-year整车 warranty. Chengli stood out in the bidding process by offering a unique after-sales commitment—'2-year factory warranty on chassis with nationwide joint service network, lifetime support for superstructure'—plus 24-hour direct spare parts dispatch capability. Ultimately, the unit signed a procurement contract with Chengli for three units of the Sinotruk-based 24 m³ sludge self-dumping trucks, at a unit price of approximately RMB 268,000 (based on publicly available tender data). Comparative Data: Chengli Solution vs. Competing Brands To help the procuring entity better visualize the advantages of Chengli’s solution, the table below compares Chengli’s Sinotruk-based 24 m³ sludge self-dumping truck against two competing models of similar class (based on publicly available parameters and industry benchmarks). Parameter Chengli Sinotruk 24 m³ Sludge Truck Competitor A (Dongfeng Chassis, 22 m³) Competitor B (FAW Jiefang Chassis, 20 m³) Chassis Brand Sinotruk (HOWO) Dongfeng FAW Jiefang Total Capacity (m³) 24 22 20 Emission Standard China VI China VI China VI Hydraulic System Imported hydraulic lock with anti-leakage design Domestic hydraulic lock Domestic hydraulic lock Body Material Corrosion-resistant steel plate (4 mm thickness) Standard carbon steel (3 mm thickness) Standard carbon steel (3 mm thickness) Sealing Performance Fully sealed cover plate with rubber gasket Semi-sealed cover plate Manual cover plate Whole-Vehicle Warranty Chassis: 2 years / Superstructure: Lifetime 1 year 1 year Reference Price (RMB 10,000)