A Step into the Past is a 2001 Hong Kong television series produced by TVB and based on Huang Yi's novel of the same Chinese title. The series tells the story of a 21st-century Hong Kong VIPPU officer who travels back in time to the Warring States period of ancient China. He is involved in a number of important historical events that leads to the first unification of China under the Qin dynasty. The series' first original broadcast ran from 15 October to 7 December 2001 on the TVB Jade network in Hong Kong.

Back to the Past is an upcoming Hong Kong historical science fiction action film directed by Ng Yuen-fai and Jack Lai, with action direction by Sammo Hung. The film is a continuation of the 2001 television series, A Step into the Past, which was based on Huang Yi's novel, The Chronicles of Searching Qin. It stars the original cast members of the series Louis Koo, Jessica Hsuan, Raymond Lam, Sonija Kwok, Joyce Tang and Michelle Saram reprising their roles from the series. Produced by Koo's One Cool Film Production, filming for Back to the Past in April 2019 in Guizhou and wrapped up on 7 July 2019.