Baoji Sinotruk Sludge Tipper Truck (24 m³) Government Procurement Case Study: Analysis of the 'Trial-First' Procurement Model Key Findings: This article presents a case study on the procurement of a 24 m³ Sinotruk sludge tipper truck by a municipal sanitation department in Baoji, employing a 'trial-first' procurement framework. It meticulously documents the vehicle’s performance during the trial period, comparative evaluation against competing market brands, and the rationale behind the decision to proceed with bulk procurement. All technical parameters are derived from Chengli Special Purpose Vehicle Co., Ltd. (e.g., model CLW5310ZWXZ6), corroborated by authentic tender documentation, offering practical procurement reference for sanitation authorities. I. Procurement Background: Trial-First Approach to Reduce Decision Risk In early 2025, a municipal sanitation department in Baoji planned to upgrade its fleet of sludge transport vehicles for handling sludge generated from wastewater treatment plants and pipeline desilting operations. Previously, the department relied primarily on aging tipper trucks, which suffered from poor sealing performance, leakage during transit, and insufficient loading capacity. Prior to launching an open tender, the project manager proposed a 'trial-first' procurement strategy: first procure one unit for operational evaluation, record its performance, and then decide whether to proceed with bulk procurement. Budgeting followed local procurement conventions, capped at approximately RMB 389,000 (tax-inclusive landed price). The final selection was a 24 m³ Sinotruk-based sludge tipper truck. Chengli Special Purpose Vehicle Co., Ltd. (located at No. 1 Chengli Avenue, Economic Development Zone, Suizhou City, Hubei Province; official website: www.clspecial.com) responded promptly to the requirement by supplying one CLW5310ZWXZ6 model sludge tipper truck—compliant with MIIT announcements—for trial use. This model features a Sinotruk chassis, full compliance with China VI emission standards, complete regulatory certification, and is eligible for nationwide registration, annual inspection, and commercial operation. The trial period lasted 30 days, covering multiple sludge transport routes across Baoji’s urban districts and surrounding counties. II. Trial-Period Performance Record: 30 Days of Real-World Data During the trial, the Chengli sludge truck completed 12 transport missions, accumulating approximately 2,800 km of driving distance and hauling roughly 240 tons of sludge in total. Key performance metrics are summarized below: Loading Efficiency: The 24 m³ body design achieved an actual payload of ~22–23 m³ (accounting for sludge moisture content), improving single-trip transport efficiency by ~40% compared to legacy units. Sealing Performance: Equipped with a hydraulic sealing cover system, the vehicle exhibited zero leakage during transit—fully meeting environmental protection requirements. Chassis Stability: The Sinotruk chassis (reference model ZZ3317V3867F1), paired with a Weichai engine, delivered robust power output and demonstrated exceptional stability on Baoji’s mountainous roads and slippery surfaces. Unloading Speed: The hydraulic lifting system operated smoothly, completing each unloading cycle in ~3 minutes—nearly halving the time required by older vehicles. Energy Consumption & Operating Cost: Fuel consumption averaged 32–35 L/100 km (based on local road conditions), representing an ~8% reduction versus comparable models in the same class. Throughout the trial, Chengli’s after-sales team provided comprehensive technical support—including driver operation training and routine maintenance guidance. The chassis is covered under Sinotruk’s nationwide warranty program, while Chengli guarantees lifetime service for the superstructure and ensures 24-hour direct shipment of spare parts. Customer feedback stated: “Zero failures occurred during the trial period; the vehicle is easy to operate