Government Procurement Case and Solution Analysis for the Sinotruk Sludge Self-Dumping Truck (24 m³) in Ordos City, Inner Mongolia. In late 2025, a municipal sanitation department in Ordos City publicly tendered for a batch of 24 m³ sludge self-dumping trucks built on Sinotruk chassis to address sludge disposal issues at local wastewater treatment plants. The project budget was capped at approximately RMB 3.202 million (per publicly available tender information), with plans to procure 10 units for sealed transportation and compliant disposal of sludge. Ultimately, Chengli Special Purpose Vehicle Co., Ltd. stood out among multiple bidders by leveraging its full-range product supply capability and factory-direct sales advantage, delivering 10 proven vehicle models. This article provides an in-depth analysis of the entire procurement process from the perspectives of project background, winning proposal, cost comparison, and service support. I. Project Background and Procurement Requirements As a resource-based city, Ordos has invested heavily in environmental governance in recent years. The municipal sanitation department is responsible for sludge transportation across multiple wastewater treatment plants within its jurisdiction. Its existing fleet is outdated and poorly sealed, resulting in frequent odor dispersion and leakage during transport—prompting urgent vehicle replacement. Key procurement requirements included: - Chassis Brand: Sinotruk (China National Heavy Duty Truck Group), ensuring power output and load-bearing capacity; - Cargo Box Capacity: 24 m³, enabling high-volume single-trip transportation; - Sealing Structure: Fully sealed hydraulic top cover to prevent secondary pollution; - Emission Standard: China VI, compliant with local environmental regulations; - Delivery Timeline: Full delivery within 30 days after contract signing. Notably, this procurement was not limited to a single vehicle type but formed part of a ‘multi-category integrated package’ including sludge self-dumping trucks and accompanying water-sprinkler trucks (for site cleaning). Per local procurement practice, such comprehensive projects typically require suppliers to offer one-stop supply capabilities to minimize management and coordination costs. II. In-Depth Analysis of Chengli’s Winning Proposal Chengli Special Purpose Vehicle developed a complete solution tailored to this requirement: ‘Sinotruk-based 24 m³ Sludge Self-Dumping Truck + Supporting Sanitation Vehicles’. The flagship model is the CLW5310ZWXZ6 sludge self-dumping truck, modified on a Sinotruk chassis and fully certified (referencing 108 data entries in the MIIT Announcement). Key specifications are as follows: 1. Chassis and Powertrain Equipped with a Sinotruk HOWO Series 8×4 chassis, powered by a Weichai 350-hp China VI engine, mated to a 10-speed transmission; wheelbase: 1800 + 3800 + 1350 mm; tire specification: 12.00R20. This chassis delivers exceptional stability under heavy-load conditions, ideal for Ordos’s coal-slag-rich, hilly terrain. 2. Superstructure and Sealing System Cargo box dimensions: 6800 × 2350 × 1500 mm, volume: 24 m³. The body is constructed from thickened Q345B steel plates with internal anti-corrosion coating. The hydraulic top cover features dual-cylinder actuation, with opening/closing time ≤15 seconds; sealing strips made of oil-resistant rubber, verified by third-party testing to achieve leakage rate <0.5%. Unloading employs front-mounted dual-lift cylinders, achieving a 45° lifting angle and improving unloading efficiency by ~30%. 3. Supporting Vehicles This project also includes two 5 m³ Dongfeng-chassis water-sprinkler trucks (CLW5070GSSD6 model), used for site cleaning and dust suppression following sludge handling. Chengli coordinated procurement of both sludge trucks and