Sin Lian Seng is a Singapore-based holding company operating in fastener supply and solar photovoltaic (Solar PV) engineering, procurement, and construction (EPC). The fastener business, the company’s primary revenue driver, distributes industrial hardware like bolts and nuts to the construction, maritime, and manufacturing sectors. It utilizes an inventory-based trading model, sourcing products from a concentrated group of manufacturers in China to sell at a markup to contractors and wholesalers in Singapore. The solar PV EPC segment provides turnkey rooftop solar solutions for commercial and industrial clients. This business follows an asset-light, project-driven model where Sin Lian Seng manages design and procurement while subcontracting all physical installation and construction work. Revenue in this segment is milestone-based and non-recurring. Sin Lian Seng's strategy focuses on expanding solar operations into larger projects and international markets, including the U.S. and Southeast Asia, and increasing its fastener inventory and product variety. A distinct characteristic of the solar business is its reliance on purchase orders and quotations rather than formal written contracts for customers and subcontractors. The fastener business maintains high supplier concentration, with a few Chinese vendors providing the majority of its inventory.