Found in 1984, TDG Holding Co., Ltd. is a National Key High-tech Enterprise thanks to its combination of scientific research, manufacturing capacities and sales activities. The company focusing on three main industries: Electronic material, specialized high-end equipment and new energy and environmental tech.

TDG actively develops itself in the sapphire industries, established its LED industrial base in Haining, Zhejiang province, and owned independently innovated core technologies. First-class R&D team, advanced production facilities and well-developed industrial chain provide a solid guarantee for the development and commercialization of LED productions.

TDG-LED, by supplying quality and large-sized sapphire crystal and wafer, is eddicated to building and internationally competitive sapphire industry and become the leader of China sapphire industry.