?Tongzheng was established in Sep, 2010,belong to lgg group.
?2500 square meter factory area.1400 sq meter clean room
.?Manufactured products:  Laser-diode(LD),Photo-diade(PD), components, optical module,optical cable assembly.
?Vertically integrated with low cost manufacturing.Most of the materials are supported by brother companies, who has been provided ferrule,sheet metal,die casting products to telecom customers.
?Main product application:Access, telecom backbone,metro area network, optical fiber exchange, optical fiber transmission relay, otpical commnication system and digital television.