Shenzhen Gongjin Electronics Co., Ltd.
Address: No. 2 Danzi North Road, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China
Postcode: 518118 
Tel:  0755-89990666
Email: mkt@twsz.com



Shanghai Gongjin Telecom Technology Co., Ltd.
Add: T9 Xiexin Building, No2,lane 187, Xinghong Road, Shanghai, China
Postcode: 200051
Fax: 021-33390888
Tel:  021-33390999
E-mail: mkt@twsz.com



Taicang T&W Electronics Co. Ltd.
Add: No. 89, Jiangnan Road, Ludu Town, Taicang, China
Postcode: 215412
Fax: 0512-33026800
Tel:  0512-33026888



TONGWEI ELECTRONICS (VIETNAM) COMPANY LIMITED
Add: Block C-04 and part C-05 of Lot CN12, An Duong Industrial Zone, Hong Phong Commune, An Duong District, Hai Phong City, Vietnam
Postcode: 180000
Web: http://www.twsz.com