In electronic manufacturing, a Subcontractor is either a manufacturer or a trading company that signs a contract to complete the partial of the full electronics project of a buyer. In fact, it is a supplier, which can only get partial aspects of a project, like only one or multiple jobs among printed circuit board (PCB) manufacturing, assembly, design, components sourcing, programming, and functional testing. MADPCB is a Chinese electronic manufacturer, provides full and partial turnkey services for end customers and trading companies.