Seven Du

Beijing China

Coder, developer, also works as a system administrator. VoIP fan, created FreeSWITCH-CN .

He writes Blogs. He also has a Linked in profile.

He written a book FreeSWITCH the Definitive Guide in Chinese.

He is working on a Start-up x-y-t.com .

  • Work
    • Beijing XinYueTong Technology