STAK Industry manufactures specialized vehicles and equipment for oilfield operations in China. Core products include oil pumping trucks, workover trucks, fracking trucks, boiler trucks, and well flushing trucks, along with standalone oilfield equipment and components. End users are oilfield service companies that use STAK's products for oil extraction, well maintenance, and field operations. STAK sells through dealers rather than directly to end users, and the top three customers account for roughly 62% of revenue. STAK operates on a make-to-order basis: dealers sign agreements and pay deposits, STAK manufactures the core equipment and coordinates final vehicle assembly with third-party licensed manufacturers, and collects the remaining payment on delivery. Because China's Ministry of Industry and Information Technology requires special permits to produce specialized vehicles, STAK outsources final assembly to two licensed manufacturing partners, retaining in-house control over design, core components, and equipment assembly. This keeps fixed costs relatively low but creates dependency on suppliers and assembly partners. Beyond vehicles and equipment, STAK also sells automation and software control products for oilfield operations. STAK's growth strategy focuses on embedding sensors, real-time monitoring, and data analytics into its products, and the company partners with Chinese universities to support R&D. STAK also plans to build after-sales service bases across major Chinese oilfields to deepen customer relationships.