TST group was founded in 1999, is a collection of production, export, trade as one of the international group co., LTD., under the Telephone Est(HK) Co. Ltd, Guangzhou Taisite Qiyefazhan co., LTD., Guangzhou Taishangtong electronic technology co., LTD., Hong Kong idiscover co., LTD.,Zhongshan tai shong tong electronic factory.