Founded in 1999, GrenTech is a high-tech enterprise specializing in the R&D and production of wireless communication systems，RF products and optical transceiver products . GT ranked 15th on "China Top 50 Communication Equipment Manufacturers”. As one of the leading companies in China communication industry ，GT listed in Nasdaq in 2006, we have been serving domestic operators and global equipment vendors (ZTE,Ericsson , Nokia etc.) over decades through endeavor of 5000+ staffs .