The most upstream products in the electronics industry are the raw materials needed to manufacture inductors, such as ferrite cores, enameled wires, silver paste, and plastic stands. The inductors are in the upper to middle stream of the industry, including wire-wound inductors, multilayer inductors, ferrite beads, and thin-film inductors. The middle to downstream are modular electronic products, such as AC/DC switching converters, motherboards for computers, EMI filtering modules, RF communication modules, etc. Finally, downstream products in the electronics industry includes all end-use electronic products (electronic products for general consumers to use directly), such as mobile phones, computers, servers, printers, TVs, audio speakers, any wearable electronic products, etc.