Keystone Technology Co.,Ltd., together with its subsidiaries, engages in the research, development, production, and sale of semiconductor display devices and special adhesive materials in China and internationally. The company offers semiconductor display devices comprising polarizers, functional devices, signal connectors, liquid crystal panels, and production auxiliary consumables for use in LCD TVs, smartphones, tablets, laptops, smart wearables, and other consumer electronic products with display screens. It also provides special adhesive materials consisting of tapes, buckles, foams, protective films, labels, and other products for use in the rail transportation and automobiles industries. In addition, the company offers photomasks. It exports its products. Keystone Technology Co.,Ltd. was founded in 2002 and is headquartered in Nanjing, China.