Seamless Green China (Holdings) Ltd. engages in the manufacture and sale of synthetic sapphire watch crystals, optoelectronic products, and trading of liquor. It also manufactures and trade light-emitting diode (LED) lighting products. It operates through the following segments: Sapphire, Optoelectronic, Liquor, and LED. The Sapphire segment supplies watch crystals for use in the manufacturing of watch products. The Optoelectronic segment comprises the supply of optoelectronic products for use in the watch products. The Liquor segment focuses on the trading of wine. The LED segment consists of the manufacture and trade of LED lighting products. The company was founded on January 18, 2001 and is headquartered in Hong Kong.