Dipl-Ing. Rainer Stahlmann, Jahrgang 1979, hat den Han Trainer Pro entwickelt und ist heute IT Freelancer. Having been fascinated by Asian culture since his childhood, the autor first became acquainted to the Chinese language in 1997. During his studies of Communications and Media Engineering in Germany, he developed his idea to Han Trainer Pro, which shows as the subject for his diploma thesis. Finally, he turned the project into a program ready for the market during his studies at Jiao Tong Universiy in China.