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Registered Address (HQ): 

Address1: 301, Block A, Yongjie North Road, Haidian District, Beijing, China, 100094

Address2: Building 16, No.8, Heying Road, Nanshao Town, Changping District, Beijing, China, 102200

Tel: 86-10-62961177 (International Department)

Fax: 86-10-82899881

Email:   david@gwtt.com     Please send to this mail to contact us.