1. He works as a teacher in China Communication University. Making TV plays and participating in variety shows can increase his exposure, thus helping him to teach students better.
2. Zhang Shaogang may be interested in acting and has a talent for acting.
Zhang Shaogang can earn a certain income by making TV series and variety shows, which may be one of the reasons why he started acting.
Generally speaking, there may be many reasons for Zhang Shaogang to start playing TV series, including teaching, interest, income and other factors.