I. Case Background: The Trust Chain from Existing to New Customers In the daily operations of a municipal sanitation department in Kunming, sewage treatment vehicles are critical equipment for ensuring smooth urban drainage and responding to rainstorm-induced flooding. In 2024, the department planned to procure a batch of sewage treatment vehicles meeting China VI emission standards, with a budget capped at approximately RMB 558,000 per unit, requiring high-efficiency suction, separation processing, and rapid operation capabilities. During preliminary research, they learned that a sister unit—the Urban Management Bureau of a certain district—had received three sewage treatment vehicles from CLW Special Purpose Automobile in 2023, which have since operated stably, especially during high-frequency rainy-season operations. "Our previous older-model vehicles kept failing during the rainy season—sealing components aged rapidly and corrosion was severe. We heard from peers that CLW’s vehicles were recommended, specifically optimized for Kunming’s humid and hot climate," recalled Mr. Chen, head of the department. Through the referral from the sister unit, they contacted Zhang Yue, Sales Manager at CLW Special Purpose Automobile (Tel: ), and ultimately selected the China VI Dongfeng 3308-wheelbase sewage treatment vehicle. This 'existing customer referring new customer' model exemplifies CLW’s reputation built on service excellence. II. Vehicle Model Overview: China VI Dongfeng 3308-Wheelbase Sewage Treatment Vehicle The core model procured in this project is a sewage treatment vehicle modified on the Dongfeng 3308-wheelbase chassis, designed in accordance with the official announcement parameters of CLW’s CLW5070GSSD6 model. Compliant with China VI emission standards, it meets Kunming’s latest environmental requirements. Key features include: • Anti-Corrosion Coating: To address Kunming’s high-humidity and rainy climate, the entire tank body and piping system feature an epoxy-resin anti-corrosion coating, offering superior corrosion resistance and extended service life. • Sealing Component Durability for Humid-Hot Environments: All sealing components utilize fluororubber material—resistant to high temperatures, oil, and aging—ensuring reliable performance under heavy-duty rainy-season operations. • Adaptability to High-Operation Frequency: Equipped with a high-power vacuum pump and an efficient separation system, the single-cycle operation time is reduced by 30%, meeting the demand for frequent deployment during the rainy season. • Chassis Advantages: Dongfeng chassis offers nationwide warranty coverage; CLW upfitting provides lifetime after-sales support, with spare parts shipped directly within 24 hours to ensure rapid fault response. III. Government Procurement Solution: From Requirement Identification to Delivery During procurement, the municipal sanitation department selected the supplier via public tendering. Following local procurement conventions, the budget was controlled at approximately RMB 500,000 per unit, with unit prices ranging between RMB 178,000–201,000 (based on publicly available tender information). CLW Special Purpose Automobile provided a transparent configuration plan—avoiding bundled pricing—to ensure customers could select models precisely according to their needs. The table below compares key performance differences between the department’s previously used outdated vehicles and the CLW China VI Dongfeng 3308 sewage treatment vehicle (referencing CLW5070GSSD6 official announcement parameters): Comparison Item Outdated Vehicle CLW China VI Dongfeng 3308 Sewage Treatment Vehicle Emission Standard China IV / China V China VI Tank Material Standard Carbon Steel Epoxy-Resin Anti-Corrosion Coated Steel Sealing Material Nitrile Rubber Fluororubber (Heat- & Oil-Resistant) Vacuum Pump Type Single-Stage Pump Dual-Stage Pump (30% Efficiency Improvement) Separation System Manual Separation Automatic Solid