I. Background of Joint Procurement: Addressing Regional Sludge Transportation Pain Points. In 2025, multiple districts and county-level cities under Xianyang City, Shaanxi Province—including Qindu District, Weicheng District, and Xingping City—face a common challenge during municipal sanitation infrastructure upgrades: With the expansion of wastewater treatment plants, large volumes of dewatered sludge (with moisture content of approximately 60%–80%) generated daily require compliant, efficient, and environmentally friendly transport vehicles for off-site disposal. Previously, independently procured small-capacity sludge trucks (e.g., 8–15 m³) across districts suffered from low transport efficiency, poor sealing performance, and frequent sludge spillage causing road pollution, as well as high maintenance and repair costs. To address this, the municipal sanitation authority has spearheaded a cross-district joint procurement initiative, targeting 24-m³ sludge self-unloading trucks built on SINOTRUK chassis, with a total budget capped at approximately RMB 16.69 million (based on publicly available tender information), planning to procure around 30 units to reduce per-unit cost and standardize post-purchase maintenance protocols. This procurement prioritizes three key criteria: transport efficiency (24-m³ capacity ensures maximum single-trip loading), leak-proof sealing (to prevent sludge dripping and odor dispersion during transit), and chassis reliability (SINOTRUK brand proven to withstand Shaanxi’s complex road conditions and heavy-duty operational demands). II. Unified Technical Standard Development: Ensuring Fair Competition and Quality Baseline. To prevent suppliers from misrepresenting technical parameters, the procuring entity developed a detailed technical specification prior to tendering, with core requirements as follows: Chassis Model: SINOTRUK HOWO or HAOHAN series; wheelbase approx. 1800 + 3800 mm; engine power ≥220 hp; emission standard: China VI (compliant with latest environmental regulations). Superstructure Requirements: Body capacity ≥24 m³; constructed from high-strength steel (Q345B or higher grade); floor plate thickness ≥6 mm; side plates ≥4 mm; equipped with hydraulic lifting system (top-lift or front-lift configuration), minimum lift angle ≥45°; rear door features hydraulic locking seal and anti-drip liquid collection trough. Whole-Vehicle Announcement: Must be an active model listed in the MIIT (Ministry of Industry and Information Technology) vehicle announcement database, enabling normal registration and annual inspection (e.g., reference models such as CLW5250ZWXZ6, a typical sludge self-unloading truck). After-Sales Service: Chassis covered by nationwide warranty; superstructure must provide minimum 2-year or 50,000-km warranty; supplier must guarantee 24-hour response time for repairs. III. Centralized Tendering and Chengli’s Supply Advantages. Following open tendering, expert evaluation, and prototype testing, Chengli Special Purpose Vehicle Co., Ltd. emerged as one of the core suppliers for this project, leveraging its comprehensive cost-performance ratio and mass-production delivery capability. Its competitive advantages include: Factory-Direct Sales (No Middlemen): Compared to traditional 4S dealership channels, Chengli offers direct quotations—delivering savings of approximately RMB 8,900–16,700 per unit (per internal benchmark data). For this 24-m³ sludge truck, Chengli’s tax-inclusive landed price (including freight and commissioning) ranges between RMB 378,000–423,000 per unit (aligned with tender practice), below market average. Comprehensive MIIT Announcements, Hassle-Free Registration: Chengli maintains full-series MIIT announcements for sludge self-unloading trucks (e.g., CLW5250ZWXZ6 and similar models), ensuring smooth registration and commercial operation permit issuance at the Xianyang Traffic Management Bureau. Rapid Delivery and After-Sales Support: Production based in Suizhou ena