Switchboard： (0898)67489893
International Trade Special Line (0898)67489883
E-mail: sales@gktbp.com
Domestic Trade Special Line： (0898)67489811
E-mail: csh@gktbp.com
E-commerce Hotline(0898)67489733
E-mail: dzsw@gktbp.com
Hotline : 400-9933-007
