A Step Into The Past (2001)

This series is about a man, Hong Siu Long who is from 21st century-Hong Kong travels back into the past during the Warring States Period in China. Unfortunately, the time machine comes into an error when he is being transferred into the past. As a result, Hong Siu Long comes to the period which is three years earlier than he is supposed to be and therefore, he can't go back to the future. In an effort to go back to the future, he tries to keep the history goes as it is supposed to be.