so Grandwon Corp. is most likely the GW brand https://translate.google.com/translate?hl=en&sl=zh-CN&u=http://www.szguangwen.com/about/contact.html&prev=search https://translate.google.com/translate?hl=en&sl=zh-CN&u=http://www.szguangwen.com/about/contact.html&prev=search