Seven Du

Consultant, Writer, and Software Engineer in Yantai China

Read my blog

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

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

He published a book FreeSWITCH the Definitive Guide in Chinese.

He is working on a product XSwitch .

  • Work
    • Yantai XiaoYingTao Technology