Shenzhen:Room A510, Car Building, No.45 Zhenhua Rd., Futian District,
     Shenzhen, China
     Telephone Exchange: 86-755-83345435
     Fax: 86-755-83340768
     Post Code: 518031

     PCB: 86-755-83328342    Postmaster@greattong.com  (Ms. Zhang)
     OEM: 86-755-83328032    givon@greattong.com  (Mr. Liu)
     R&D: 86-755-83260689    laixm@greattong.com  (Mr. Lai)
     I C: 86-755-83260959       Rock@greattong.com  (Mr. Cao)

     Guangzhou: Room N6-2508, Tianlangming Habitat, Guangzhou Avenue Zhong, Tianhe District,
     Guangzhou, China
     Tel.: 86-020-38627591 sales_gz@greattong.com

     Fax: 86-020-38602792
     Post Code: 510655

     Shanghai：Room 1605, Anji Commercial Buidings, No. 528 Guangxi North Road, Huangpu District,
     Shanghai, China
     Tel.: 86-021-63510972
     Fax: 86-021-63507628
     E-mail：ml_yang@greattong.com
     Post Code: 200001
  
     Hong Kong: Room 208, Flourish Industrial Building, No. 33 Sheung Yee Road, Kowloon Bay,
     Kowloon, Hong Kong
     Tel: 852-61155858, 852-35951234
     Fax: 852-35683699   E-mail：sales@greattong.com

     PCB Factory.: 65 Dong Zhongwu ZND FL., Bao’an District, Xixiang Town,
                              Shenzhen Jinji  Industrial Park, Xiaojinkou Town,
                              Huizhou, Guangzhou, China

     SMT Factory.: A Dong, Shuidou New Village Industrial Park,
                               Longhua, Shenzhen, China