T& dimension is T & ampw, which generally refers to a series of enterprises with the same dimension headquartered in Shenzhen. Tongwei was founded in 199 1 and registered as "T & ampw" trademark in the State Trademark Office in T&. Tongwei has successively invested and established Tongwei (Hong Kong) Co., Ltd., Shenzhen Tongwei Co., Ltd., Shenzhen * * * Gold Electronics Co., Ltd., Taicang Tongwei Co., Ltd., Shanghai * * Gold Communication Technology Co., Ltd. and Tongwei's Russian office.